Asteroid Ejecta Burned Dinosaurs in Hours, Defying Freeze Theory

We Finally Know How the Dinosaurs Died. It Was Worse Than We Thought — Sabine Hossenfelder

Sabine Hossenfelder

Fine silicate dust trapped infrared heat from hypersonic rock droplets, creating an atmospheric furnace that incinerated exposed dinosaurs within hours before global starvation set in.

AI-assisted summary of We Finally Know How the Dinosaurs Died. It Was Worse Than We Thought — original source. Check the original for full context.

Source published:

Key ideas

  • A new study challenges the standard narrative of a slow dinosaur extinction, showing that a massive thermal radiation pulse likely burned vast numbers of dinosaurs to death within hours of the asteroid impact. (0:00)
  • Sediment evidence of fine silicate dust reveals that re-entering rock vapor droplets generated extreme kinetic heat that was trapped below an atmospheric dust blanket, turning the planet's surface into an inescapable infrared oven. (1:27)
  • Physical shielding determined immediate survival: burrowing mammals and aquatic organisms escaped the line-of-sight thermal pulse, whereas large surface-dwelling dinosaurs had nowhere to hide. (3:59)
  • Survivors of the initial firestorm still faced the long-term secondary phase of extinction, as atmospheric dust blocked sunlight for years, halting photosynthesis and triggering widespread starvation. (3:59)

Detailed notes

## Background Published on YouTube by Sabine Hossenfelder on September 18, 2026, this video examines new research challenging the traditional narrative of dinosaur extinction. While conventional science posited that dinosaurs slowly starved over years due to sunlight-blocking dust, recent calculations reveal that an immediate, far more violent firestorm wiped out vast numbers of them within hours of the asteroid impact.

## TL;DR Contrary to the textbook theory that dinosaurs perished through prolonged cold and starvation, a new scientific study indicates that surface-dwelling dinosaurs were burned alive in a matter of hours. The impact blasted vaporized rock high into the atmosphere, which condensed and re-entered at hypersonic speeds, while a newly accounted-for layer of fine silicate dust trapped the resulting infrared radiation like a thermal blanket. This turned the lower atmosphere into a superheated planetary oven under total darkness, sparking widespread wildfires and killing any creature caught in the open. Burrowing, aquatic, and cave-dwelling species managed to survive the initial thermal blast, only to face the subsequent multi-year ecological collapse and global starvation.

## Atmosphere & style The presentation combines Sabine Hossenfelder's trademark analytical skepticism with grim, vivid descriptions of apocalyptic physics. The narrative shifts rapidly from an intellectual reassessment of textbook geology into a horrifying, visceral visualization of a pitch-black inferno where the atmosphere itself turned into an oven. It feels grounded yet deeply unsettling, culminating in a somber reflection on the sheer fragility of life on Earth and the pressing necessity for asteroid defense.

## Bulletin - [00:00](https://www.youtube.com/watch?v=1tV3Qp0bwbI&t=0s) A new study challenges the standard narrative of a slow dinosaur extinction, showing that a massive thermal radiation pulse likely burned vast numbers of dinosaurs to death within hours of the asteroid impact. - [01:27](https://www.youtube.com/watch?v=1tV3Qp0bwbI&t=87s) Sediment evidence of fine silicate dust reveals that re-entering rock vapor droplets generated extreme kinetic heat that was trapped below an atmospheric dust blanket, turning the planet's surface into an inescapable infrared oven. - [03:59](https://www.youtube.com/watch?v=1tV3Qp0bwbI&t=239s) Physical shielding determined immediate survival: burrowing mammals and aquatic organisms escaped the line-of-sight thermal pulse, whereas large surface-dwelling dinosaurs had nowhere to hide. - [03:59](https://www.youtube.com/watch?v=1tV3Qp0bwbI&t=239s) Survivors of the initial firestorm still faced the long-term secondary phase of extinction, as atmospheric dust blocked sunlight for years, halting photosynthesis and triggering widespread starvation.

## Key takeaways - [00:00](https://www.youtube.com/watch?v=1tV3Qp0bwbI&t=0s) The traditional textbook model posits that the dinosaur extinction was primarily a slow collapse driven by years of sunlight blockage and starvation. - [00:00](https://www.youtube.com/watch?v=1tV3Qp0bwbI&t=0s) The 10-to-15-kilometer asteroid that struck the Gulf of Mexico vaporized massive amounts of rock along with surface water. - [01:27](https://www.youtube.com/watch?v=1tV3Qp0bwbI&t=87s) Vaporized rock ejected into the upper atmosphere condensed into tiny droplets that fell back to Earth at hypersonic speeds. - [01:27](https://www.youtube.com/watch?v=1tV3Qp0bwbI&t=87s) Re-entering droplets generated extreme friction, producing a powerful pulse of kinetic heat. - [01:27](https://www.youtube.com/watch?v=1tV3Qp0bwbI&t=87s) Newly accounted fine silicate dust acted as an atmospheric thermal blanket, trapping infrared radiation and superheating the lower atmosphere. - [01:27](https://www.youtube.com/watch?v=1tV3Qp0bwbI&t=87s) The resulting thermal pulse would have been immediately fatal to humans and cooked exposed animals alive on the surface. - [01:27](https://www.youtube.com/watch?v=1tV3Qp0bwbI&t=87s) Ambient infrared radiation reached levels sufficient to spontaneously ignite both dry vegetation and live green trees. - [01:27](https://www.youtube.com/watch?v=1tV3Qp0bwbI&t=87s) The global firestorm occurred in near-total darkness, as lofted dust simultaneously blocked sunlight. - [03:59](https://www.youtube.com/watch?v=1tV3Qp0bwbI&t=239s) Direct line-of-sight exposure dictated initial mortality, allowing subterranean and aquatic species to survive the initial blast. - [03:59](https://www.youtube.com/watch?v=1tV3Qp0bwbI&t=239s) Large non-avian dinosaurs could not find subterranean or underwater shelter, making them uniquely vulnerable to the thermal pulse. - [03:59](https://www.youtube.com/watch?v=1tV3Qp0bwbI&t=239s) Surviving the immediate thermal wave only postponed catastrophe, as lingering atmospheric dust subsequently collapsed food chains over years. - [03:59](https://www.youtube.com/watch?v=1tV3Qp0bwbI&t=239s) The ease with which Earth's biosphere was destabilized emphasizes the modern necessity of planetary asteroid defense systems.

## Detailed walkthrough ### [00:00](https://www.youtube.com/watch?v=1tV3Qp0bwbI&t=0s) The Conventional Extinction Story vs. The Rapid Firestorm

The widely accepted consensus is that roughly 66 million years ago, a massive asteroid crashed into the Earth at the edge of what is known today as the Gulf of Mexico, spelling doom for the dinosaurs. The impactor measured an estimated 10 to 15 kilometers across, leaving behind cataclysmic destruction. While the physical impact itself was a catastrophic local event, it alone would not have eliminated life across the entire globe. Consequently, the leading textbook hypothesis has long posited a slow, agonizing demise: debris thrown into the upper atmosphere blocked sunlight, cooling the planet, halting photosynthesis, and causing food chains to collapse from the bottom up over the course of years until the remaining fauna starved.

A recent study upends this slow-death timeline with a far more violent alternative. Rather than wandering across a progressively freezing, barren wasteland for months or years, vast numbers of dinosaurs likely met their end within mere hours of impact in an unimaginable horror: they were literally burned to death.

```mermaid flowchart TD accTitle: Asteroid Impact Thermal Mechanism accDescr: Step-by-step physical process leading from asteroid impact to global thermal radiation and wildfires. subgraph Impact["The Impact Event"] A["10–15 km Asteroid strikes Gulf of Mexico"] --> B["Intense pressure & heat vaporize water and rock"] end subgraph Atmosphere["Atmospheric Dynamics"] B --> C["Vaporized rock blasted high into atmosphere"] C --> D["Rock vapor condenses into tiny liquid droplets"] D --> E["Droplets re-enter atmosphere at extreme velocity"] end subgraph Fallout["Global Thermal Pulse"] E --> F["Extreme friction generates intense kinetic heat"] G["Fine silicate dust layer traps infrared radiation"] --> H["Trapped heat causes global surface temperature spike"] F --> H H --> I["Lethal thermal radiation and widespread wildfires"] end ```

---

[01:27](https://www.youtube.com/watch?v=1tV3Qp0bwbI&t=87s) The Missing Silicate Dust and the Global Microwave Effect

The physics behind this rapid catastrophe begins at ground zero. When the asteroid struck, the immense pressures and temperatures did not simply vaporize water; they vaporized vast volumes of solid rock. This vaporized material was ejected high into the atmosphere. Unlike fine, lingering dust that drifts for years, this material condensed into countless tiny droplets that quickly plummeted back toward Earth at hypersonic speeds. Re-entering the atmosphere produced enormous frictional heat.

Crucially, scientists have recognized for decades that falling ejecta would produce a pulse of heat, but earlier models concluded the temperature rise was insufficient to spontaneously ignite global flora. The new calculations re-evaluate this using recent sediment evidence showing immense amounts of fine silicate dust lofted alongside the ejecta. When this fine silicate dust is factored in, it creates a massive thermal blanket. The dust above trapped the intense infrared radiation generated by the falling droplets below, preventing heat from escaping into space and superheating the lower atmosphere into a planetary oven.

- **Human lethality:** The resulting thermal radiation pulse was powerful enough that it would have been instantly fatal to humans. - **Immediate cooking:** Any animals exposed in the open were effectively cooked alive by the ambient infrared radiation. - **Wildfire ignition:** The heat flux was sufficient to immediately ignite dry vegetation and potentially healthy green trees. - **Suffocating darkness:** The dust layer simultaneously blocked incoming visible light, meaning the entire inferno unfolded under near-total darkness, illuminated primarily by raging ground fires in a literal "hell on earth."

---

[03:59](https://www.youtube.com/watch?v=1tV3Qp0bwbI&t=239s) Sheltered Survivors and the Fragility of Life

Survival during the first hours came down to physical shielding. The thermal radiation traveled line-of-sight from the sky; thus, burrowing animals underground, aquatic creatures submerged in water, or species concealed in caves avoided the direct infrared blast. Small mammals could hide in subterranean dens, and amphibians and reptiles could dive beneath water surfaces. A massive, ten-ton terrestrial dinosaur, however, had nowhere to hide.

The researchers emphasize that this does not mean every single dinosaur on the globe dropped dead within sixty minutes. Regional variations, weather systems, or fortunate geography may have spared patches of the Earth from the initial thermal pulse. However, surviving those first few hours merely bought time. Once the re-entering debris settled and the furnace subsided, the remaining fine dust continued to choke the atmosphere, cutting off sunlight for years and initiating the classic secondary phase of mass starvation and ecological collapse. Reflecting on the fragility of our planet and quoting singer-songwriter Tori Amos—*"Doesn’t take much to tear us into pieces"*—humanity would do well to start developing asteroid defense technology.

---

[05:10](https://www.youtube.com/watch?v=1tV3Qp0bwbI&t=310s) Sponsor: Document Management with UPDF

Managing research literature involves dealing with endless PDF documents. Sabine highlights the tool UPDF as a flexible utility that simplifies editing text and graphics directly, highlighting and annotating findings, and reorganizing document pages without rebuilding files from scratch.

- **Optical Character Recognition (OCR):** Accurately transforms scanned historical papers into editable, searchable text. - **Exporting options:** Converts PDFs into editable Word or Excel files when raw data or text must be transferred elsewhere. - **Security & utilities:** Features tools to fill and sign official forms, password-protect documents, and redact sensitive information. - **Integrated AI features:** Capable of summarizing dense academic papers, answering user questions about document contents, translating across languages while preserving visual formatting, and assisting in finding related scientific literature across mobile and desktop platforms.

## Notable quotes > [00:00](https://www.youtube.com/watch?v=1tV3Qp0bwbI&t=0s) Roughly 66 million years ago, a massive asteroid crashed into the Earth at the edge of what is known today as the Gulf of Mexico, spelling doom for the dinosaurs. — Sabine Hossenfelder

> [00:00](https://www.youtube.com/watch?v=1tV3Qp0bwbI&t=0s) Rather than wandering across a progressively freezing, barren wasteland for months or years, vast numbers of dinosaurs likely met their end within mere hours of impact in an unimaginable horror: they were literally burned to death. — Sabine Hossenfelder

> [01:27](https://www.youtube.com/watch?v=1tV3Qp0bwbI&t=87s) When the asteroid struck, the immense pressures and temperatures did not simply vaporize water; they vaporized vast volumes of solid rock. — Sabine Hossenfelder

> [01:27](https://www.youtube.com/watch?v=1tV3Qp0bwbI&t=87s) The dust above trapped the intense infrared radiation generated by the falling droplets below, preventing heat from escaping into space and superheating the lower atmosphere into a planetary oven. — Sabine Hossenfelder

> [01:27](https://www.youtube.com/watch?v=1tV3Qp0bwbI&t=87s) The resulting thermal radiation pulse was powerful enough that it would have been instantly fatal to humans. — Sabine Hossenfelder

> [01:27](https://www.youtube.com/watch?v=1tV3Qp0bwbI&t=87s) Any animals exposed in the open were effectively cooked alive by the ambient infrared radiation. — Sabine Hossenfelder

> [01:27](https://www.youtube.com/watch?v=1tV3Qp0bwbI&t=87s) The entire inferno unfolded under near-total darkness, illuminated primarily by raging ground fires in a literal 'hell on earth.' — Sabine Hossenfelder

> [03:59](https://www.youtube.com/watch?v=1tV3Qp0bwbI&t=239s) A massive, ten-ton terrestrial dinosaur, however, had nowhere to hide. — Sabine Hossenfelder

> [03:59](https://www.youtube.com/watch?v=1tV3Qp0bwbI&t=239s) Doesn’t take much to tear us into pieces — Tori Amos

> [03:59](https://www.youtube.com/watch?v=1tV3Qp0bwbI&t=239s) Humanity would do well to start developing asteroid defense technology. — Sabine Hossenfelder

## Mentioned Gulf of Mexico, Sabine Hossenfelder, Tori Amos, UPDF, Microsoft Word, Microsoft Excel

## Video description "Edit, convert, OCR, sign, summarize, translate, and research PDFs—all in UPDF. One license can be used on all platforms to edit and sync PDFs! Get UPDF Pro with a limited offer: https://updf.com/go/SabineHossenfelder-2609"

66 million years ago an asteroid hit Earth and the dinosaurs died. The story we usually tell is that the impact dimmed the sun, plants died, food chains collapsed, and everything starved over years. A new calculation says something much faster and much worse happened first. Let's take a look.

Paper: https://doi.org/10.1029/2026JG009837

#dinosaurs #science #sciencenews #extinction #asteroid

👕T-shirts, mugs, posters and more: ➜ https://sabines-store.dashery.com/ 💌 Support me on Donorbox ➜ https://donorbox.org/swtg 👉 Transcript with links to references on Patreon ➜ https://www.patreon.com/Sabine 📝 Transcripts and written news on Substack ➜ https://sciencewtg.substack.com/ 📩 Free weekly science newsletter ➜ https://sabinehossenfelder.com/newsletter/ 👂 Audio only podcast ➜ https://open.spotify.com/show/0MkNfXlKnMPEUMEeKQYmYC 🔗 Join this channel to get access to perks ➜ https://www.youtube.com/channel/UC1yNl2E66ZzKApQdRuTQ4tw/join 📚 Buy my book ➜ https://amzn.to/3HSAWJW

[Source](https://www.youtube.com/watch?v=1tV3Qp0bwbI)

中文简报

颠覆严寒理论：小行星抛射物数小时内烧死恐龙 微细硅酸盐尘埃阻隔了高超音速岩石液滴释放的红外热量，形成大气熔炉，在全球性饥荒降临前数小时内便将暴露在外的恐龙焚烧殆尽。 与恐龙死于长期严寒和饥荒的传统教科书理论相反，一项新的科学研究表明，地表恐龙在短短数小时内就被活活烧死。撞击将汽化的岩石轰入高层大气，岩石冷凝后以高超音速重返大气层，而此前未被充分考虑的一层微细硅酸盐尘埃如隔热毯般阻困了由此产生的红外辐射。这导致低层大气在彻底的黑暗中化作超高温的行星级烤箱，引发广泛野火，并杀死了暴露在开阔地带的任何生物。穴居、水生和栖息于洞穴的物种虽在最初的热冲击中幸存，但随后仍不得不面对长达数年的生态崩溃与全球饥荒。 一项新研究对恐龙缓慢灭绝的传统说法提出挑战，表明在小行星撞击后的数小时内，巨大的热辐射脉冲可能就已烧死了绝大部分恐龙。 (0:00) 微细硅酸盐尘埃的沉积物证据表明，再入大气层的岩石蒸汽液滴产生了极强的动能热量，并被困在大气尘埃层下方，使地表变成难以逃脱的红外烤箱。 (1:27) 物理遮蔽决定了能否在最初阶段幸存：穴居哺乳动物和水生生物避开了直射的热脉冲，而生活在地表的大型恐龙则无处可藏。 (3:59) 在最初风暴中幸存的生物仍面临次生灭绝阶段的长期考验，大气尘埃遮挡阳光长达数年，阻断了光合作用并引发大范围饥荒。 (3:59)

Reading summary

A recent study re-evaluates the mass extinction 66 million years ago, proposing that rather than slowly starving during a prolonged impact winter, vast numbers of dinosaurs were incinerated within hours by an intense global thermal pulse trapped by atmospheric silicate dust. Revising the Slow-Death Extinction Model (0:00) The prevailing scientific consensus holds that approximately 66 million years ago, an asteroid measuring 10 to 15 kilometers across struck what is now the Gulf of Mexico. Traditional textbook hypotheses posited that the extinction unfolded as a slow, agonizing process over months or years: lofted debris blocked sunlight, halted photosynthesis, and triggered a bottom-up food chain collapse that eventually starved surviving fauna. A new study upends this timeline by showing that a massive portion of the dinosaur population likely perished within mere hours of the impact. Atmospheric Physics and the Silicate Thermal Trap (1:27) The rapid kill mechanism was driven by vaporized rock blasted into the upper atmosphere. This rock vapor condensed into tiny droplets that plummeted back to Earth at hypersonic velocities, generating extreme frictional heat. While previous models concluded that re-entry heat alone could not spontaneously ignite global flora, the revised calculations integrate recent sediment evidence demonstrating that massive quantities of fine silicate dust were lofted alongside the ejecta. This silicate dust layer formed an atmospheric thermal blanket. By blocking incoming visible light while preventing re-emitted infrared radiation from escaping into space, it transformed the lower atmosphere into a planetary oven. The resulting thermal radiation pulse was powerful enough to be immediately fatal to exposed terrestrial animals and intense enough to ignite both dry vegetation and living green trees under pitch-black skies. Physical Shielding and the Delayed Secondary Phase (3:59) Survival during the first hours was determined by physical shielding from line-of-sight thermal radiation. Small mammals sheltering in subterranean dens, aquatic organisms submerged beneath water, and animals concealed in caves avoided the direct infrared blast, whereas massive, ten-ton terrestrial dinosaurs lacked cover. Although researchers note that regional weather patterns and geography may have temporarily spared isolated pockets, survival during this initial window merely delayed death. As the re-entry inferno subsided, the lingering dust initiated the long-theorized secondary phase, blocking sunlight for years and inducing widespread starvation and ecosystem collapse. The study illustrates the sudden vulnerability of the biosphere during major impact events, prompting Sabine Hossenfelder to highlight Earth's fragility and emphasize the practical necessity of developing planetary asteroid defense technology.

Source quotes

[0:00] Sabine Hossenfelder: Roughly 66 million years ago, a massive asteroid crashed into the Earth at the edge of what is known today as the Gulf of Mexico, spelling doom for the dinosaurs. [0:00] Sabine Hossenfelder: Rather than wandering across a progressively freezing, barren wasteland for months or years, vast numbers of dinosaurs likely met their end within mere hours of impact in an unimaginable horror: they were literally burned to death. [1:27] Sabine Hossenfelder: When the asteroid struck, the immense pressures and temperatures did not simply vaporize water; they vaporized vast volumes of solid rock. [1:27] Sabine Hossenfelder: The dust above trapped the intense infrared radiation generated by the falling droplets below, preventing heat from escaping into space and superheating the lower atmosphere into a planetary oven. [1:27] Sabine Hossenfelder: The resulting thermal radiation pulse was powerful enough that it would have been instantly fatal to humans. [1:27] Sabine Hossenfelder: Any animals exposed in the open were effectively cooked alive by the ambient infrared radiation. [1:27] Sabine Hossenfelder: The entire inferno unfolded under near-total darkness, illuminated primarily by raging ground fires in a literal 'hell on earth.' [3:59] Sabine Hossenfelder: A massive, ten-ton terrestrial dinosaur, however, had nowhere to hide. [3:59] Tori Amos: Doesn’t take much to tear us into pieces [3:59] Sabine Hossenfelder: Humanity would do well to start developing asteroid defense technology.

Original transcript

[0:00] We might finally know how the dinosaurs died.  And it was much more horrific than we thought. [0:07] This is what the authors of a  recent study say. Let’s have a look. [0:11] Sixty-six million years ago, an asteroid hit  Earth and wiped out the dinosaurs. That much, [0:24] pretty much everyone agrees on. We know where the  asteroid hit, it was at the edge of the Gulf of [0:30] Mexico, formerly known as the Gulf of Mexico. And  we know roughly how big it was, it had a diameter [0:37] of about 10-15 kilometres. And we know that the  aftermath of the impact changed the climate on [0:43] planet Earth for years because all the debris that  was blasted into the atmosphere dimmed the sun. [0:50] But what exactly killed the dinosaurs? As  devastating as the asteroid impact itself was, [0:56] it was a local event. It wouldn’t have killed  all dinosaurs on the planet. The current leading [1:01] hypothesis has it that it was the dimming of the  sun that caused the widespread extinction. Plants [1:07] died, and all animals that lived off them, and  then the animals that lived off these animals, [1:12] and so on. Entire food chains broke down.  This would have taken years to play out. [1:17] But the new calculations now say that  many of the dinosaurs died within [1:21] hours of the impact in the most  gruesome way: They burned to death. [1:27] They say what happened is roughly the following.  The asteroid hit the edge of the Gulf of Mexico. [1:32] This created enormous amounts of pressure and with  that, heat. The heat didn’t just evaporate water, [1:38] it vaporised enormous amounts of  rock as well. With the impact, [1:42] a lot of that vaporised rock was  blasted high into the atmosphere. [1:46] But this is not the fine dust that stays  up there for years and dims the sun. It [1:52] doesn’t go high enough for that, and it’s  not distributed thinly enough. Instead, [1:56] much of this vaporised rock  condensed into tiny droplets. [2:00] Those droplets then fell back to Earth.  And now here comes the important point: [2:05] they fell through the atmosphere at enormous  speed. That created a lot of heat. And because [2:11] of all the other dust above the falling droplets,  the heat couldn’t escape. This leads to a sudden, [2:16] global increase of temperature, high enough to  set plants on fire, and pretty much everywhere. [2:22] This insight isn’t entirely new. Scientists  have known for decades that the immediate [2:28] aftermath of the impact would have caused  a short burst of heat at the surface. But [2:33] previous calculations said that it wasn’t hot  enough to ignite vegetation. The authors of the [2:38] new paper now took into account recent evidence  that updates the scenario. This recent evidence [2:43] is that scientists found in sediments a lot of  fine silicate dust from the impact. The previous [2:49] calculations left out this fine dust that was  also in the atmosphere. And the authors of the [2:54] new paper now say that if one properly adds this  dust, then this heat-burst gets so much worse. [3:01] Indeed they calculate that the thermal  radiation created by the impact would [3:05] have been lethal to humans. It would also  have immediately cooked any animals caught [3:11] in the open. It was strong enough to  set fire to dry vegetation immediately, [3:15] maybe even healthy trees. Most other animals  on land would then have perished in the fires. [3:21] And all of this happened surprisingly quickly.  It just took a few hours to play out, so many [3:28] dinosaurs may not have spent weeks or months  wandering around an increasingly cold and barren [3:35] planet. They may have died on the same day that  the asteroid hit. The particularly nasty part is [3:41] that it may have happened largely in darkness,  because the same tiny particles that blocked [3:46] infrared radiation from escaping also blocked  visible light. The fires themselves would have [3:52] provided some light, but otherwise there may have  been very little to see. Basically, hell on earth. [3:59] This would not have killed all animals  though. An animal inside a burrow, [4:03] under water, or otherwise shielded from  the sky would have absorbed far less of [4:08] the radiation. Small mammals might have been  able to hide underground, many reptiles and [4:14] amphibians could seek shelter in water. But  a ten-tonne land dinosaur had nowhere to go. [4:20] The researchers are not claiming that every  dinosaur everywhere dropped dead within an [4:25] hour. Maybe there were parts of the planet  that didn’t burn, maybe some got just lucky. [4:31] But their calculations show that the  immediate aftermath of the impact could [4:36] have been considerably more destructive  than scientists previously thought. [4:41] And surviving the first few  hours was only the beginning, [4:45] because once the returning debris had stopped  heating the atmosphere, the dust was still [4:51] there to block the sunlight which killed  many of the remaining plants and animals. [4:56] The worst part is, you know, it could happen  again. As Tori Amos put it so well, “Doesn’t take [5:02] much to tear us into pieces.” Life is fragile.  Better get started on that asteroid blaster. [5:10] You know what used to be the worst part about  research for me? dealing with PDFs and yet there's [5:16] no way around them. But today's sponsor UPDF has  solved this problem for me and maybe they can help [5:23] you too. With UPDF, I can edit text and images  directly, annotate key findings and reorganize [5:30] pages without having to rebuild the document.  It can even deal with scanned sources because [5:36] it's got an optical recognition that turns scans  into editable text. And when I need the content [5:42] elsewhere, I can convert the PDF to Word or  Excel. UPDF can also fill and sign forms, protect [5:49] important files, and in case you the US government  redact the interesting names. UPDF also comes with [5:56] a built-in AI that can summarize papers, answer  content questions, or translate the paper while [6:03] preserving the layout. It even helps me research  related work and it all works across desktop and [6:10] mobile. And here comes my limited special offer.  If you use my link, you'll get a special discount [6:17] for UPDF Pro. So go and check this out. Links in  the info. Thanks for watching. See you tomorrow.