TIL, fossils exist from < O(1M+)ya Also TIL, (from tangential reading) even dinosaur fossils contain original bone material from the organism, not just rock in

TIL, fossils exist from < O(1M+)ya Also TIL, (from tangential reading) even dinosaur fossils contain original bone material from the organism, not just rock in the shape of the original bones. Of course it makes complete sense in retrospect.