While basically all frogs are semi-aquatic to some degree, some species spend nearly all of their lives underwater! Though they are quite rare, there are several notable varieties of nearly fully ...

In most narratives, the story of evolution is the story of organisms emerging from the ocean and eventually populating the land. But for some species that evolution also involved a return trip. Dozens ...

The chances of aquatic mammals — like orcas, dolphins and whales — ever evolving to live on land again are almost nonexistent, a new study has found. Researchers discovered that the adaptations that ...

On the tail of the discovery of a whale fossil that is the largest animal on record, researchers in Egypt announced the unearthing of one of the smallest early whales known to science. The find is ...

Egyptian paleontologists found a new, extinct whale species, about the size of a bottlenose dolphin. It is the smallest known whale of the extinct Basilosauridae family, says the scientists' new study ...

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