Biologists used to assume that ribbon worms were short-lived, fragile creatures, the kind of invertebrates that flicker ...

Mosasaurs were enormous reptiles best known for ruling ancient oceans more than 66 million years ago, but new evidence suggests some also lived in rivers. Scientists reached this conclusion after ...

UCCE experts urge producers to monitor their animals for signs of the parasite, which has been moving north from Central and South America.

Here’s where tigers and lions are vastly different. Tigers are solitary cats, maintaining individual territories and joining ...

Anacondas achieved their massive size millions of years ago. Discover how anacondas stayed huge while other giant reptiles died out!