The trilobite thrived in the seas for hundreds of millions of years before the crisis.
Your feedback is important to us!
We invite all our readers to share with us their views and comments about this article.
Disclaimer: Comments submitted by third parties on this site are the sole responsibility of the individual(s) whose content is submitted. The Daily Star accepts no responsibility for the content of comment(s), including, without limitation, any error, omission or inaccuracy therein. Please note that your email address will NOT appear on the site.
Alert: If you are facing problems with posting comments, please note that you must verify your email with Disqus prior to posting a comment. follow this link to make sure your account meets the requirements. (http://bit.ly/vDisqus)
Sometimes bad things come in small packages. A microbe that spewed humongous amounts of methane into Earth's atmosphere triggered a global catastrophe 252 million years ago that wiped out upward of 90 percent of marine species and 70 percent of land vertebrates.That's the hypothesis offered by researchers aiming to solve one of science's enduring mysteries: what happened at the end of the Permian period to cause the worst of the five mass extinctions in Earth's history.The first dinosaurs appeared 20 million years after the Permian mass extinction.The best example of that, Rothman said, was the advent about 2.5 billion years ago of bacteria engaging in photosynthesis, which paved the way for the later appearance of animals by belching fantastic amounts of oxygen into Earth's atmosphere.The most famous of Earth's mass extinctions occurred 65 million years ago when an asteroid impact wiped out the dinosaurs that ruled the land and many marine species.
FOLLOW THIS ARTICLE