An old satellite that was falling back to Earth has plunged into the middle of the Pacific Ocean.
The UARS spacecraft was the size of a bus, but scientists say most of it burnt up when it passed through the atmosphere and the rest fell into the sea north-east of the Samoan islands.
There were no reports of anyone being hurt.
Space agency Nasa warns that if you find any bits, not to touch them and to call the emergency services.
The spaceraft was the biggest satellite to return to Earth by itself in about 30 years.
It was sent into orbit on the space shuttle Discovery in 1991 to study the upper atmosphere.
But it has been out of action for the last six years and gravity has been slowly pulling it back to Earth.