ENV200H1 Lecture Notes - Lecture 3: Ocean Current, Flowering Plant, Himalayas
Document Summary
Lifespan of earth itself, humans were only present v v recently. Half way through the life of earth, 50% of its life time has passed. Devonian period jurrasic period; various large life stages that earth has moved through (cid:1) (cid:1) August 1st in imaginary year moves us into cambrian year which is the period in which we can find fossils; before this they were unfindbale (cid:1) Ages of fishes, land plants, amphibians, insects, reptiles, birds (cid:1) Important to know how late in the year dinosaurs went extinct; in hypothetical year it is dec 19th ; 97% of earths history is past when the dinosaurs go. (cid:1) Humans appear dec 31st at 8pm, late to the party but done since then has been huge (cid:1) (cid:1) (cid:1) 2. 5 million years since appearance of genus homo. 200,000 years ago was the anatomically modern human (upright, larger brain) (cid:1)
