Watch a science experiment showing how balloons can float using methane and hydrogen instead of helium. See how hydrogen is created with a simple chemical reaction, inflating balloons that rise into ...

Witness the dramatic reaction as a soda can meets hydrochloric acid in this intense science experiment. Watch the magic unfold as we explore chemical reactions up close! Trump issues vague response to ...

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.