Shape and symmetry help determine where a leaf lands — and if the tree it came from can recoup the leaf’s carbon as it decomposes.

Stone tools and stone circles discovered in coastal Scotland show that prehistoric people settled farther north than anyone ...

Witkoff has embraced untraditional tactics and defied some conservatives as the administration seeks quick wins in the Middle ...

The veteran Washington winger has been a presence for the Capitals against the Hurricanes in the NHL playoffs, and ...