Cold Mountain Air
If hot air rises, why is it colder at the top of mountains? (because hot air cools as it rises)
Radioactive Sub
The nuclear material from the sunken Kursk submarine doesn't seem to be contaminating the …
All Species Inventory
A 25-year effort to discover, identify, and catalog every living species on Earth.
Billiard Break
Is it possible to sink all the billiard balls on the break shot? (Highly improbable)
Killifish and Pollution
Killifish in a river contaminated with creosote have adapted to the pollution.
Fluorescent Lights
Why aren't fluorescent bulbs used in headlights or spotlights? (Can't focus them as well)
Mars Hotel
A hotel in orbit around the sun could ferry astronauts between Earth and Mars.
Tree Torture
Testing how trees along the San Pedro River respond to water deprivation
Calico Copycats
Will a calico cat clone always be calico? (No, fur color/pattern depends on both genes and …
Mercury Sunrise
Mercury accumulates in arctic regions because of unusual chemistry in the atmosphere
Mobile Phone Towers
Is the radiation from mobile phone antennae dangerous? (only if you get too close to the source)