Here is a concise summary of the text:
**Title:** Life After the Dinosaurs: The Aftermath of the Asteroid Impact
**Summary:**
* 66 million years ago, a massive asteroid (11-80 km in diameter) struck Earth, causing:
+ Mega tsunamis (up to 1.5 km high)
+ Global fires
+ Earthquakes (up to 12 magnitude)
+ Acid rain
+ Year-long sunlight blockage
* The disaster led to:
+ 75% of life extinction, including all non-avian dinosaurs
+ Devastation of forests, oceans, and ecosystems
* Recovery process:
+ Single-celled organisms (foraminifera) repopulated within years
+ Ferns dominated the landscape for 1,000 years
+ Mammals evolved from small (600g) to larger species over 1 million years
+ Oceans recovered in approximately 3 million years
* The asteroid impact ultimately triggered human evolution, and while another such event would be catastrophic for humanity, the planet would likely recover.
Here are the key facts extracted from the text, without opinions, in short sentences with numbers:
**Event and Impact**
1. A massive asteroid/comet (11-80 km in diameter) hit Earth around 66 million years ago.
2. The impact occurred at the end of the Cretaceous period, causing a global catastrophe.
3. The asteroid created a crater approximately 150 km (93 miles) in diameter and 20 km (12 miles) deep.
4. The impact triggered mega tsunamis with waves over 100 meters (330 feet) high, affecting areas now known as Texas and Florida.
**Immediate Aftermath**
5. The explosion was about 100 million times more powerful than the Tsar Bomba nuclear test.
6. Forests within thousands of kilometers were destroyed in seconds.
7. The impact caused 12-point earthquakes and landslides as far as Argentina, triggering new tsunamis.
8. Tiny particles of rock were thrown into the atmosphere, later found worldwide.
**Environmental and Biological Consequences**
9. The atmosphere was rapidly heated by falling particles, equivalent to 20 million megatons of TNT.
10. About 75% of living things, including most dinosaurs and mammals over 25 kg (55 lbs), were destroyed.
11. Acid rain oxidized the oceans, and half of all plant species died immediately or soon after.
12. Soot and dust blocked sunlight, causing a year-long "impact winter."
**Recovery and Evolution**
13. The first organisms to recover were single-celled foraminifera, appearing in the crater a few years after the impact.
14. Ferns repopulated the land within a millennium, occupying most available space.
15. Small mammals (under 600 grams) initially thrived, with larger mammals reappearing after 100,000 years.
16. The diversity of species increased threefold around 200,000 years later, with larger mammals (up to 25 kg/55 lbs) emerging.
17. The oceans took approximately 3 million years to recover, with new species filling vacant ecological niches.
18. Birds, descendants of surviving dinosaurs, and some lizard species adapted and survived.
**Human Evolution and Future Implications**
19. The asteroid impact is considered a trigger for human evolution.
20. If a similar disaster were to occur, most of humanity might not survive, but the planet would eventually recover.