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What is divergent evolution?

Convergent evolution is when different organisms independently evolve similar traits.  For example, sharks and dolphins look relatively similar despite being entirely unrelated. Sharks (opens in new tab) are egg-laying fish with the deadly ability to sniff out blood in the water, while dolphins are curious mammals that navigate by making clicking sounds and listening for their echoes. Those differences aren't too surprising, considering that the duo's last common ancestor swam the seas some 290 million years ago. .