Things were pretty different hundreds of millions of years ago, and although we haven’t quite mastered time travel yet, fossils give a glimpse into our prehistoric Earth. So, let’s look back at some incredible — and incredibly weird in some cases — extinct fauna and flora.Research LinksAnimalsAll That’s Interesting — The Glyptodon Was A Prehistoric Armadillo So Big That Early Humans Used Its Shells For SheltersNatural History Museum — What Was Megatherium? Earth Archives — The Biggest Insect Ever Was a Huge "Dragonfly"Smithsonian Magazine — Scientists Reveal What May Be the Largest Flying Bird EverBBC — Giant Sea Scorpion Claw UnearthedNational Geographic — Buzzsaw Jaw Helicoprion Was a Freaky RatfishPlantsBernheim Arboretum and Natural Forest — Vanishing Acts: The Franklin TreeThe Environmentor ­— 7 Facts About Sigillaria, One Of The Weirdest Trees To Ever LiveSmithsonian Magazine — Long Before Trees Overtook the Land, Earth Was Covered by Giant Mushrooms

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