Jonathan, the world's oldest tortoise, has turned 191, living through 40 U.S. presidents and 31 St. Helena governors.
Researchers recorded the movements of ocean predators and found many diving to depths of over 3,200 feet for reasons that are currently unclear.
Fossilized bird tracks discovered in Australia show these ancient creatures lived in the southern polar regions on the supercontinent of Gondwana.
True crabs evolved to migrate between marine and land environments multiple times throughout their 250 million-year-old history, new study finds.
Coastal wolves in Alaska have learned to kill marine mammals, and have developed a "unique" lone hunting strategy to take down prey, scientists have said.