You are the lucky student of a wacky professor who develops…

You are the lucky student of a wacky professor who develops a time machine and he asks if you will test it with him. You get in and there’s an immediate glitch. The read out indicates that  you have traveled back 80 million years ago, and are now stuck in the Mesozoic era.  Which of the following would you most likely see when you step out of your time machine?

The largest extinction event recorded in the fossil record w…

The largest extinction event recorded in the fossil record was the Permian-Triassic extinction, which gave rise to the Mesozoic era. Nearly all multicellular life was eliminated. It is estimated that 96% of marine life and 70% of terrestrial animals went extinct.  What is one of the possible causes of that extinction event?