A newly described extinct giant penguin from New Zealand has unusually long legs and a long, slender beak, and it dates to a time when much of the region was underwater.
Italian naval officers found a dead angular roughshark (also known as the pig fish) in the waters near Elba.
Tardigrades, often called water bears or moss piglets, are near-microscopic animals that are almost indestructible and can even survive in outer space.
A roundup of the 11 most bizarre creatures found washed up on the shore in the last decade, from sea potatoes to penis fish.
Some animals, such as poison dart frogs, carry enough toxic chemicals to kill multiple adult humans, but they've evolved tricks to avoid poisoning themselves.
These ghastly meals provide male butterflies with chemicals that they use to produce mating pheromones, which female butterflies find irresistible.
Researchers caught rare footage of a juvenile angel shark swimming off the UK coast, offering hope that the critically endangered species is still breeding.
A newly described species of mosasaur, an extinct marine reptile, swam through Cretaceous seas 80 million years ago and had a slender snout like a crocodile's.
Thylacines, once widespread in Australia, have been extinct for nearly a century, but newly colorized footage provides a glimpse of what they looked like in life.
A photo showing a group of male cheetahs trying to cross a raging river in Kenya is part of the 2021 Wildlife Photographer of the Year competition.
An ocean creature that lived around 500 million years ago was the largest predator on the sea bottom.
The discovery of a massive dinosaur jawbone dating to 90 million years ago reveals a previously unknown apex predator that prowled in what is now Uzbekistan.
A brown, long-tailed bird at the Taronga Zoo Sydney in Australia has learned how to mimic the shrieks and shrills of human babies.