A ride down from the top of Chicago's fourth-tallest building turned into a terrifying drop early Friday for a group of people, including a pregnant woman, who plunged 84 floors when a cable broke.

In the wee hours of Friday, an elevator malfunction at Chicago's former John Hancock Center, now known as 875 North Michigan Ave., sent a car with six occupants plunging from the 95th to the 11th ...

Every week, the readers of our space newsletter, The Airlock, send in their questions for space reporter Neel V. Patel to answer. This week: space elevators. In September, scientists submitted a paper ...