A black hole can 'burp' after devouring a star.
Why it is true
Astronomers observed a black hole emitting a jet of matter years after it destroyed a star. This phenomenon is compared to a cosmic 'burp', where the black hole releases some of the energy and matter it consumed.
Source: Astronomy
Would you rather be asked first?
This is the reading side of the site, so the answer is in the sentence above — that is the whole point of it. Test yourself works the other way round: the question comes on its own, and the fact and the explanation only appear once you have answered.
Related facts
The Titanic was equipped with only 20 lifeboats, enough to hold about half of the people on board.
The Great Pyramid of Giza was built without the use of the wheel.
The first recorded ancient Olympic Games took place in 776 BC in Olympia, Greece.
Astronomers have discovered a cosmic object that is a star made entirely of black holes.