We do not know what dark energy is but its existence allows astronomers to explain so many features of the universe. A new hypothesis suggests quite a peculiar source of this energy: black holes.

The story of this giant hole in the ground is woven into Utah’s history, but it’s also left its mark on our planet Earth.

Cold Creek, a 5-mile, meandering run of clear water that starts from holes in the ground and flushes into ... tentacled creek flows steadily over a dark, undulating bottom, passes under a bridge ...