Earliest well-preserved tetrapod may never have left the water

Superbly preserved fossils from Russia cast new and surprising light on one of the earliest tetrapods — the group of animals that made the evolutionary transition from water to land and ultimately became the ancestors not just of amphibians, reptiles, birds and mammals, but of ourselves.

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Are humans changing animal genetic diversity worldwide?

Human population density and land use is causing changes in animal genetic diversity, according to new research. The research show that environmental changes caused by humans are leading to changes in genetic variation in thousands of species of birds, fish, insects, and mammals. The evidence for human impacts was most clear for insects and fish species.

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