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!

It grows quickly and depends on adult worker ants to feed it. These workers decide how much and what kind of food the larva ...

Russian researchers have coaxed microscopic animals back to life after they spent roughly 24,000 years locked in Siberian ice ...

Scientists found the 500-million-year-old fossil of a "penis worm" in the Grand Canyon—and reconstructed how the creature would have used its strange mouth to feed. The newly discovered species of ...

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