Physicists may have uncovered a surprising new clue that string theory—the idea that the universe is built from unimaginably tiny vibrating strings—could be more than just a mathematical fantasy.

If you could take an apple and break it into smaller and smaller parts, you would find molecules, then atoms, followed by subatomic particles like protons and the quarks and gluons that make them up.

The lactational amenorrhea method (LAM) is a type of birth control that relies on hormones your body makes while breastfeeding. If you strictly meet the guidelines, LAM can be 98% effective in ...