[Marxism] Fwd: The Greatest Animal War - Issue 17: Big Bangs - Nautilus

Louis Proyect lnp3 at panix.com
Mon Oct 26 08:08:45 MDT 2015

Battles fought 542 million years before today helped fuel a blast that 
brought humans and most animals into existence. The great Cambrian 
Explosion was a period of unprecedented one-upmanship. Beastly claws 
crushed through thin skin, and soft-bodied creatures evolved shells 
shaped like scythes, sickles, and shields.

For about a billion years prior, the cells and genes that would later 
create animals were evolving in microscopic organisms who inhabited the 
oceans of Earth (see Deep Time). These essential molecular changes may 
only be inferred today because they’re not preserved in fossils. The 
earliest traces of animals, about 580 million years old, appear soft, 
with no sign of claws, teeth, limbs, or brains. Then, within 54 million 
years (a relative blink but still, 270 times the duration of humans’ 
existence thus far), most of the main animal groups around today 
originated. This rapid rate of increase in animal architectures has 
never since been repeated.

full: http://nautil.us/issue/17/big-bangs/the-greatest-animal-war

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