Uncover 10 weirdest things ever discovered inside animals.

In a nutshell Drugs processed by the liver can become significantly more toxic to brain cells than when directly exposed to ...

Never mind the fishy smell at Oakestown Intermediate; it just means fifth-graders are getting an up-close lesson on anatomy ...

Animal testing requirements for monoclonal antibodies and other medications will be “reduced, refined or potentially replaced ...

That's because sex — and gender roles, too —permeates all the way down to the most unreproductive of cell types. If you want to do science about animals including humans, sex as a biological variable ...

The first Trump administration built long segments of steel wall on Arizona's border. Conservationists fear wildlife will suffer if work resumes.

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