A new study theorizes that evolution ticks at different speeds, especially when a big group of organisms first appears.
Green Matters on MSN
Scientists finally solve major evolution puzzle regarding world’s oldest animals
The missing link in the mystery turned out to be an event called the Cambrian explosion. It was only after it that living ...
A badly crushed cranium unearthed decades ago from a riverbank in central China that once defied classification is now shaking up the human family tree, according to a new analysis.Related video above ...
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