[Related: The ‘living fossil’ that thrived during a mass extinction.] Interestingly, plants on land ... Earth by an average of five to 11 degrees Fahrenheit. As a result, up to 80 percent of ...

About 252 million years ago, upward of 80% of all marine species vanished during the end-Permian mass extinction ... in Earth and planetary sciences, offered a modern analogy with land animals ...

While most species on land did not fare much better, the scope of terrestrial impacts has been debated by scientists. One prevailing ... the end-Permian mass extinction. All of this plant life ...

The calculations suggested 2.5 supernovas might affect Earth in some way every 1 billion years, equating to one ... a mass extinction. During the Devonian geological era, life thrived on land ...