Skunk Smell
A listener wants to know if skunks are repelled by their own smell.
Anteater Diet
How giant anteaters get enough food into their tiny mouths to survive.
Wind Temperature
Moving air feels colder than still air, but what does the thermometer say?
Sizing Up Dogs II
A listener asks whether it's true that large dogs don't live as long as small dogs.
Baseball on the Moon
Could a well-thrown baseball sail from the moon’s surface into orbit?
Why Are Plants Green?
The dominance of green chlorophyll on Earth may have come after a more purple period.
Living Cells
You probably have heard that hair is made up of dead cells. But are living cells really "alive"?
Wisdom Teeth
Why do we get wisdom teeth if they often don’t even fit in our jaws?
24-Hour Colds
Why you sometimes feel a cold coming on, only to have the symptoms disappear the very next day.
Spider Webs
A listener asks: Can spiders get caught in the webs of other spiders?
Mountain High
Have you ever been to a high altitude and found yourself gasping for breath? One listener asked why that happens.
Sitting Close to the TV
A Science Update listener asks if sitting too close to the television can hurt your eyes.
24-Hour Colds
Why you sometimes feel a cold coming on, only to have the symptoms disappear the very next day.
Similar Snowflakes
A listener asks: Why do snowflakes appear so similar to each other?
Star Distance
Astronomers calculate the distance to the furthest stars by comparing them to stars they know.
Metal in Microwaves
If metal isn’t supposed to go in microwave ovens, why do some of them have metal racks?
Space Elevator
Could a “space elevator” carry supplies to the International Space Station?
Why Are Plants Green?
The dominance of green chlorophyll on Earth may have come after a more purple period.
Baby Tooth Cavities
Baby teeth fall out eventually. But that doesn't mean cavities in baby teeth should be ignored.