Slewing bearings

In the southernmost reach of earth, a telescope is helping scientists solve a great mystery of the cosmos. Fasten your seatbelt. What follows is a wild ride through the universe. The journey begins down at the frozen South Pole, where an enormous microwave telescope collects data on cosmic events that occurred some 7 billion years ago. When these events took place, the earth had not yet been formed. The sun had not lit...