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

The tallest plants alive today can grow to over 100 meters tall. But they evolved from ancestors that were just a few centimeters high. Exactly how they got so big is uncertain, but new research on a ...

The tallest plants alive today can grow to over 100 meters tall. But they evolved from ancestors that were just a few centimeters high. Subscribe to our newsletter for the latest sci-tech news updates ...

Narrator: Well here we are ladies and gentlemen, in the heart, the powerhouse of the circulatory system, the hardest working muscle in the entire human body! Your heart first pumps blood to your lungs ...