blog 5

The first major extinction is climate change change. It affect marine animals and there habitat. the second major extinction was near the end of the Devonian Period. The 3 major extinction was AT THE end of the Permian period. The fourth major extinction was at the end of the Triassic period shortly after dianosouars and mammals evolved. The 5th major extinsion was at the end of the Cretaceous period. The last major extinction was is mostly human caused events.