For more than a century, scientists have wondered why physical structures like blood vessels, neurons, tree branches, and ...

Scientists make predictions about the structure and function of objects based on observations. Ms. Gentemann introduces natural and man-made structures and how to observe them. / Emily Gentemann, ...

Natural bridges are rock formations shaped by geological activity over millions of years. Let's take a look at some of these stunning natural structures. Pont d'Arc, FranceA popular tourist attraction ...