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Rescooped by Dr. Stefan Gruenwald from Amazing Science
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The Great Mass Extinctions - The Time When The Earth Nearly Died

Permian Extinction 250 Millions years ago, which caused extinction of 95% of all living species in both animals & plants life. This extinctions was slow and took nearly 80000 years in 3 stages:

 

1- Increase in world temperature by 5 degrees Centigrade casued by super lengthy eruptions of Siberian Trapes

 

2-melting the frozen resoviours of Methan gas in the seabeds and releasing Carbon 12 (C12), which is a green house gas and raised sea temp by anothre 5 degrees, and that casued

 

3-world temp raised 10 degrees and that caused the mass extinctions

 

it took Earth millions of years to recover and after 20 millions years from then Dinosaurs first appeared.

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Rescooped by Dr. Stefan Gruenwald from Amazing Science
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Ice World - 24,000 years ago ancient Europeans were on the brink of annihilation [Video]

Ice World - 24,000 years ago ancient Europeans were on the brink of annihilation [Video] | Science-Videos | Scoop.it

Join a small group of ancient Europeans as they teeter on the brink of annihilation, struggling with the most extreme living conditions anyone has ever faced, from encroaching sheets of ice that swallowed every bit of fertile land to a climate that was, on average, 70 degrees colder than it is today. For these humans, survival meant more than simply keeping warm; it meant abandoning their hunting and gathering lifestyle and finding a whole new way of living - a way of living that endures to this day. Go back in time 24,000 years to the last Ice Age and watch in awe as Ice World brings this amazing stuggle to life. Through computer graphics and reconstructions, you'll see how the earth's climate shifted over time, eventually covering much of North America and Europe with two-mile-thick ice sheets.

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