It was visible for only a few seconds, last seen east of the North Carolina Zoo before breaking up into ... likely a fragment of an asteroid—burns up upon entering Earth's atmosphere.

PITTSBURGH — A small electrical fire broke out at the Pittsburgh Zoo’s Aquarium building on Tuesday morning. A spokesperson for the zoo said the fire was quickly placed under control.

The spacecraft dipped down, close to the surface of the asteroid known as Ryugu, fired a projectile at its surface, snatched some sample material, and then gently drifted back into its original ...