24 hour scale model of the Earth's history By alvaro pereiro Period: 4600 BCE to 540 BCE Precambric 3800 BCE 1st life forms (4:10) 540 BCE 1st most complex life forms: 21:07 pm Period: 540 BCE to 245 BCE Paleozoic 500 BCE Great explosion of life: 21:10 pm 455 BCE Fish age 21:37 420 BCE First terrestrial plants (gymnosperms): 21:48 360 BCE Amphibian age 22:13 245 BCE Age of the reptiles: 22:43 Period: 245 BCE to 66 BCE Mesozoic 240 BCE 1st dinosaurs and mammals: 22:44 160 BCE 1st angiosperms: 23:22 120 BCE Age of the birds: 23:39 Period: 66 BCE to 1 BCE Cenozoic 20 BCE 1st hominids: 23:53 2 BCE 1st Homosapiens 23:59
