The Big Bang theory raises some important questions about the fundamental nature of the universe: Will the expansion of the universe, set in action by the Big Bang, continue forever? Or will gravity ...

Find out where to be and what to do for the eclipse experience of a lifetime. Be ready. On August 12, 2026, the first total solar eclipse for mainland Europe since 1999 will be visible from parts of ...

Hold the CD in the sunshine. Or if it's a cloudy day, turn out the lights and shine your flashlight at the CD. Hold your piece of white paper so that the light reflecting off the CD shines onto the ...

When you watch a continuously rotating spiral, the motion detectors in your eyes become adapted to that motion. Then, when you look away, the world seems to move toward or away from you. Click on the ...

Discover why your favorite cat videos don't leak out of optical fibers. A transparent material, such as glass or water, can actually reflect light better than any mirror. All you have to do is look at ...