Add Yahoo as a preferred source to see more of our stories on Google. Your small intestine is lined with tiny protrusions called villi that play a big role in digestion. Sebastian Kaulitzki/Science ...

Why do some animals eat feces? Here are some biological reasons for it and what you can do about it as a pet owner.

(The Conversation is an independent and nonprofit source of news, analysis and commentary from academic experts.) Much of the food you eat is absorbed by your digestive system, which includes your ...

Curious Kids is a series for children of all ages. If you have a question you’d like an expert to answer, send it to [email protected]. Much of the food you eat is absorbed by your ...

(The Conversation is an independent and nonprofit source of news, analysis and commentary from academic experts.) Brian Robert Boulay, University of Illinois Chicago (THE CONVERSATION) Advertisement ...