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 ...

How long is your small intestine? With a few items from around the house, you can learn the science behind your small intestine. Use the yardstick to measure and cut 23 feet of yarn or rope. The yarn ...

When it comes to intestines, it sure seems like two are better than one. I asked my friend Franck Carbonero why that is. He’s a microbiologist at Washington State University. He studies the bacteria ...