Cancer isn’t one disease, it's hundreds of them. Yet all cancers share the same root cause: errors called mutations that build up in our genes.
Because of these errors, cells may begin dividing uncontrollably, forming tumors that grow and spread. Take a closer look at cancer, known risk factors, and ways you can protect yourself.
Lightning is striking right now, and it’s likely accompanied by thunder.
In spite of their common occurrence, thunderstorms with deadly flashes of electricity still give scientists something to study. Discover where most lightning strikes in the U.S. and elsewhere — and why you should always proceed with caution in its presence.
The firefly is nature’s prime example of chemiluminescence: light created by chemicals without significant heat. Scientists discovered that a molecule that emits light when excited combined with an energy source to excite it creates a chemical reaction resulting in a glow.
Thus the glow stick was born — and parties and concerts would never be the same!
The International Space Station is a symbol of international cooperation — a true reflection of the collaborative nature of science.
Orbiting 250 miles above the Earth, the ISS houses teams of astronauts and scientists. See what's it's like to live and work in microgravity for months at a time.