Einstein’s Theory of General Relativity is currently our best approximation of how the universe ticks. But there are holes.

GOTTFRIED LEIBNIZ, MATHEMATICIAN: When Isaac first explained his theory of gravity to me, I remember being impressed. Not by the theory, which, as far as I could tell, was basically that stuff falls ...

ST. PETERSBURG, Fla. — It's a tale as old as time itself: Isaac Newton sat under a tree, got hit in the head with an apple and came up with the theories of gravity and motion. So, the story itself may ...

Newton's apple tree bound for zero gravity Sir Isaac Newton's famous apple tree is about to leave gravity behind. Flying aboard space shuttle Atlantis next week will be a 4-inch sliver of the tree ...

Here's a scene you've probably imagined countless times: Isaac Newton lounging beneath an apple tree, suddenly getting bonked on the head by falling fruit, and boom—gravity is discovered. It's the ...

While many people around the world are opening presents and gathering with family as part of honoring of the birth of baby Jesus, some science enthusiasts are also celebrating another kind of luminary ...