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 ...

See yourself as others see you in this cylindrical mirror. A flat mirror will always reflect an image that's right side up and reversed right to left. A cylindrical mirror can produce images that are ...

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 ...