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When Did Our Backbones First Appear?
An exciting fossil find in China points to a 525-million year old sea-dweller who used its new backbone to swim nimbly away from predators
An exciting fossil find in China points to a 525-million year old sea-dweller who used its new backbone to swim nimbly away from predators
Source: Smithsonian
Posted on: Thursday, Feb 26, 2015, 7:56am
Views: 1195
Posted on: Thursday, Feb 26, 2015, 7:56am
Views: 1195
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