This classic physics experiment involving a swinging bowling ball turns into a painful and hilariously dramatic lesson in momentum for one daring participant. While trying to demonstrate the principle ...

Science experiment with a large bottle suddenly becomes much more dramatic than expected. A younger man holds the setup while ...

A panel of physicists and astronomers will preview emerging theories and experiments aimed at solving the mystery of dark energy, an invisible force that dominates the universe, from 1:45 to 4:45 p.m.