Flowering Plants
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240 MYA Flowering Plants developed during the Jurassic period. First flowering plant is the Magnolia.
Dinosaurs
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225 MYA, During the Mesozoic, era dinosaurs dominated Earth.
Mammals
![Picture](/uploads/2/6/1/2/26128869/4174110.jpeg)
About 225 MYA mammals developed in the Triassic period. The first mammal was the Megazostradon that was found in Madagascar.
Mesozoic Mass Extinction.
![Picture](http://www.editmysite.com/editor/images/na.png)
This mass extinction was the largest that ever happened.