What do worms and old people have in common? Find out on this Moment of Science.
Contortionists are not able to bend their bodies in extraordinary shapes because they are double jointed, instead they are flexible in several key joints.
We need water, or H2O, to maintain our bodies in a fluid state. Water even gets involved in chemical reactions that occur in our stomachs, which break down foods containing sugars, starches, and proteins.