It’s one of the first things you learn in chemistry: Atoms and molecules are so small that even a few grams of a substance contains so m...
Why Does Heat Relax Your Muscles?
Exercise is painful. As the cliché goes, “No pain, no gain.” When the body exerts itself, pumping action out of muscles to tear them down an...
Why Do Wolves Howl?
There’s nothing quite so interesting as the social interactions in the wolf pack. Wolves live in packs of about 6 to 10 members. Pack forma...
What's the Difference Between Speed and Velocity?
When describing the motion of objects in terms of distance, time, and direction, physicists use the basic quan...
What Happened to the Megalodon?
Megalodon (Carcharocles megalodon) was the scourge of the seas some 23 million to about 2.6 million years ago, during the Miocene and Plioce...