The 7 Biggest Unanswered Questions in Physics - NBCNews.com


NBCNews.com

The 7 Biggest Unanswered Questions in Physics
NBCNews.com
If Isaac Newton suddenly popped out of a time machine, he'd be delighted to see how far physics had come. Things that were deeply mysterious a few centuries ago are now taught in freshman physics classes (the composition of stars is one good example).