Scientists in Mexico were the first to perform ultrasounds on giant manta rays to detect pregnancies. The researchers hoped to learn more about the life cycle of the largest ray species in the world.

Scientists managed to confirm pregnancies in three giant mantas with underwater ultrasound scans, offering clues to the animals’ elusive reproductive habits.

Transmissible tumors have been reported in a handful of animal species, but never before among fish. Is it possible in humans?

New research has identified areas around the world where cooler currents and other favorable conditions are helping to protect coral from the worst effects of global warming.

New research has identified areas around the world where cooler currents and other favorable conditions are helping to protect coral from the worst effects of global warming.

By tracking eye movements in zebrafish, researchers identified four different types of sleep, analogous to the complex sleep patterns of humans and other animals.