Irukandji jellyfish, which are around the same size as a dime, have a venom-filled sting that can trigger an extremely painful and occasionally deadly syndrome.
A tooth unearthed in Spain and dating to the Pliocene is the latest evidence of a crocodile ever found in Europe and supports the idea crocs crossed over from Africa about 6.2 million years ago.
Paleontologists have discovered the first molecular evidence of pheomelanin, a pigment that causes red hair, in the fossil record.
A crocodile in Kenya's Mara River was filmed thrashing around with the corpse of a baby hippo in its jaws in unusual sighting. It is unclear if the crocodile killed the calf or if it snatched a stillborn.
Three mass mortality events have struck a population of gray whales off the west coast of North America since the 1980s, and scientists have linked them to changing conditions in the Arctic.
Killer whales are surprisingly gentle in the wild when interacting with humans — though it's sometimes a different story with orcas in captivity.
Scientists discovered an enzyme within the ant "blood-brain barrier" that helps control whether an ant ends up a soldier or a forager.
Researchers documenting fossil tracks in March discovered the first tritylodontid fossils ever found in the Navajo Sandstone and rushed to retrieve them before snowmelt replenished Lake Powell.
Scientists analyzing cave lion bones have discovered the earliest evidence of Neanderthals hunting a cave lion, as well as the oldest example of human relatives using a lion pelt for cultural purposes.
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