Mon premier blog

When Life Nearly Died: The Greatest Mass Extinction of All Time by Michael Benton

When Life Nearly Died: The Greatest Mass Extinction of All Time Michael Benton ebook
Format: pdf
Publisher: W W Norton & Co Inc
Page: 336
ISBN: 9780500285732

But the Ordovician was still plenty bad, driving more than 60% of all marine species extinct - and since nearly all complex life still lived in the sea back then, that was particularly devastating. Specifically, this burst must have come from a massive stellar explosion known as a hypernova - an explosion at least a hundred times more powerful than the average supernova - that happened about a thousand light-years away. Mention "Mass Extinction" and most people will immediately think of the extinction that killed the dinosaurs.To be fair, this was pretty big, as far as extinctions go. So it's fair to say that this However, corals later go on to great heights as the major reef builders in the Triassic. The likelyhood is that corals just couldn't hack it. Once we put all that together we can produce our optimistic forecast of how long our Hollow Scene Mass Extinction Event will take to play out for us parochial, self-absorbed spinal column-possessing types. Here wandered also the “mammal-like reptiles” who once dominated, nearly died out in an even more encompassing extinction event 250 million years ago, recovered, grew huge then suffered in mass extinction that ended the Triassic. For example, I would never have guessed the European Eel was on the verge of dying out in the wild Worse, due to its habit of dashing out to the Sargasso Sea to spawn, is nearly impossible to breed in captivity. This catastrophic event happened 251 years ago, at the Permian-Triassic boundary and, you guessed it, is the worst and largest mass extinction ever. The giants among the mammal-like reptiles A two-hour jaunt to the Petrified Forest from Payson lays bare all the great questions – fate and creation and the blind and heroic persistence of life. At the P-T extinction, it was about 95%. Not only did To put it in perspective, at the K-T extinction, about 60% of life on Earth died out. Given the near-consensus mechanism of a big ole rock smacking down near the current-day Mexican Riviera,..probably the big dinos died quickly and smaller ones petered out over time. 57% of all When life nearly died: the greatest mass extinction of all time. We still don't know what by a gamma-ray burst. And I don't think species replace nearly as quickly as they die off.