◆スレッド作成依頼スレッド★41◆

What (probably) caused the world’s first mass extinction
http://www.washingtonpost.com/news/morning-mix/wp/2014/06/02/what-probably-caused-the-worlds-first-mass-extinction/

5億1000万年前の大量絶滅は破局噴火が原因
http://scienceminestrone.blog.fc2.com/blog-entry-123.html