Scientists surveying the Detroit River caught a monstrous sturgeon weighing 240 pounds (109 kilograms) and measuring 6 feet 10 inches (2.1 meters) in length.
The injured baby whale slipped free from rescuers on Monday morning, and became stranded again after swimming upstream into shallower waters.
A marine worm from waters near Australia has a branching body that divides into multiple posteriors. In other words: It has a lot of butts.
Humans may be heart-attack-prone because of a mutation that keeps us from making a particular sugar molecule.
A small desert-dwelling theropod dinosaur named Shuvuuia had excellent night vision, and its hearing was comparable to that of an owl. Like many owls, it was probably a nighttime predator.
A newly discovered species of extinct ancient turtle uncovered in Madagascar is proof of convergent evolution of suction feeding in turtles.
Microscopic worms called planarians can detect light with their bodies, after scientists removed the worms' heads.
Researchers scoured more than 27,000 bird photos on Instagram to see which ones consistently got more likes than expected. The big winner was the owl-like frogmouth.
Mustang horses roam freely across the western United States and are a symbol of pioneering spirit, but they aren't quite wild.
The animal kingdom is filled with stretchy mouths, from hamster cheeks to blue whale pleats, but which animal has the stretchiest mouth of all?
A new study looks at how scientists captured the world's first (and second) recordings of a giant squid in its natural habitat.
Scientists have solved a 150-year-old mystery surrounding the classification of the extinct horned crocodile from Madagascar, giving it its own evolutionary group.
For the first time, researchers have captured images of bizarre brown trails on an Arctic ridge that appear to have been left by sponges crawling across the seafloor.