字幕表 動画を再生する 英語字幕をプリント No matter how much you want it to be real, Jurassic Park is fake. Bummer. But the Jurassic period is real. It is this time period: right here in the middle of the Mesozoic Era, between the Triassic Period and the Cretaceous Period. Big words are cool. It started about 199 million years ago and lasted about 54 million years. It’s also when pangea, the supercontinent, started splitting apart. The term Jurassic comes from the Jura Mountains where we first found rocks from this time period, but you probably know it for being “The Age of Reptiles” - because Dinosaurs. Like the stegosaurus, brachiosaurus and allosaurus, but sadly not the T-Rex. He came after the Jurassic. Steven Spielberg is a liar. Also, bike’s can’t fly, unlike birds which first appeared during the jurassic period.