Cells Alive
You probably have heard that hair is made up of dead cells. But are living cells really …
African American Scientists
Calcium and Stroke
Everyone knows that calcium helps build and maintain strong and healthy bones. But it also has …
Munching Mates
Many fathers in the animal kingdom are deadbeat dads by human standards. But redback spider dads are …
Air in Space
Even astronauts' waste water is put to work in the extreme environment of space.
Panda Raising
How is the National Zoo making sure its panda cub will grow into a healthy, happy adult?
Hospital Noise
A hospital room is the last place you'd expect to get some rest--overhead pages and beeping …
Sound Laser
One listener asks: Can sound be directed into a beam, like a laser? The answer might surprise you.