Distinguishing Dinos
A listener asks how paleontologists know which species a dinosaur’s bones belong to.
Why Is It?
Trees vs. Climate Change
Are coniferous or deciduous trees best at sucking up CO2?
Dinosaur Watching?
Is your bird feeder a window back to the Cretaceous period?
Blowing Away Germs
A listener asks if opening all the windows will spread cold and flu germs around.
Space Elevator
Could a “space elevator” carry supplies to the International Space Station?
Wind Temperature
Moving air feels colder than still air, but what does the thermometer say?
Cooking Spray
How can companies claim that cooking sprays are “fat-free” if the first ingredient is oil?
Baby Tooth Cavities
Baby teeth fall out eventually. But that doesn't mean cavities in baby teeth should be ignored.