A dramatic video showing a pod of adult orcas, better known as killer whales, chasing a lone penguin has gone viral on social ...

Leopard seals rank among the largest seal species on Earth, with adult females reaching nearly 12 feet in length and weighing ...

Experts say the Trump administration has unraveled decades of investment in the people and models that track how climate change is harming us.

The massive migration of eastern North Pacific gray whales — the longest mammalian migration in the world — sees thousands of ...

A biologist explains the surprising evolutionary math behind how the blue whale became the largest animal that has ever lived ...

From a Pacific island lapped by turquoise ocean to the heart of Ireland's ancient east, these are Metro editors' top ...

"When a big shadow appears in the deep blue & starts moving straight towards you,” reads the Manta Dive Center Instagram ...