Nesting Dogs
A listener asks why dogs sometimes turn around in circles before lying down.
Distinguishing Dinos
A listener asks how paleontologists know which species a dinosaur’s bones belong to.
Trees vs. Climate Change
Are coniferous or deciduous trees best at sucking up CO2?
Invisible Frogs
A Science Update listener wants to know the identity of a nightly neighborhood noisemaker.
Dinosaur Watching?
Is your bird feeder a window back to the Cretaceous period?
Baby Tooth Cavities
Baby teeth fall out eventually. But that doesn't mean cavities in baby teeth should be ignored.
Credit Card Fraud
How do cyber criminals steal your credit card information?
Spoiled Milk
A listener asks why milk goes bad more quickly than other beverages.
The Sun’s Temperature
A listener asks: How hot is the surface of the sun?
Collecting & Hoarding
A listener asks why some people become collectors and hoarders.
Ultrasound Safety
A listener asks: Can medical ultrasound damage your ears?
A Nestling Mystery
A listener asks: How do baby birds get enough water when they’re still in the nest?
Tsunamis & Sealife
A listener asks: What happens to the seafloor and to sealife when tsunamis hit?
Vitamin C & Pasteurization
A listener asks if pasteurizing orange juice destroys its vitamin C.
Star Distance
Astronomers calculate the distance to the furthest stars by comparing them to stars they know.
24-Hour Colds
Why you sometimes feel a cold coming on, only to have the symptoms disappear the next day.