SPuD: What surprises or amazes you about the time line? What pattern(s) do you notice in the development of life on Earth?

Earth forms: 4,600,000,000 years ago 4.6 bya

Bacteria: 3,800,000,000 years ago 3.8 bya 0.002 mm

First multicellular organisms: 2,100,000,000 years ago 2.1 bya

First Fish: 530,000,000 years ago 530 mya

First Land Plants (fungus): 475,000,000 years ago 475 mya

First Amphibian: 375,000,000 375 mya ~ 2 feet

First mammal: 200,000,000 years ago 200 mya About 6 in long

First humans: 200,000 years ago Homo neanderthalensis: our closest extinct human relative