events in Earth’s history By becca23456 4600 BCE Planet earth formed 4500 BCE earths core and crust formed 4400 BCE earth's first oceans formed 4.0 billion years ago 3850 BCE first life on earth appeared 1500 BCE oxygen accumulated in earth's atmosphere 700 BCE the first animals evolved 530 BCE the first fish evolved 400 BCE the first land plants evolved 225 BCE the first dinosaurs evolved from lizards 58 BCE the dinosaurs went extinct 13 BCE 140,000 years ago, modern humans evolved 350 the first vertebrates evolved
