A new study provides some of the first empirical evidence that island biodiversity really is different from that of the mainland.
Creating the future today.
Once a tract of tropical forest has been cleared, sloths have relatively little capacity to seek out new habitats.
"The cause of the decline in the penguin population is man," said bird veterinarian Paula Arce. "And of its eggs ... That could be the rats."
The discovery challenges the widely held assumption that a period of explosive evolution quickly follows for survivors of mass extinctions.
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