the Arctic Circle (the North Pole ... First, I’m going to find out which half of the Earth he’s on. Running around the middle of the planet is an imaginary line called the Equator.

The finest ever map of the cosmic microwave background - the faint evidence of the universe's early form - has yielded ...

New research by the Atacama Cosmology Telescope (ACT) collaboration has produced the clearest images yet of the universe’s ...