The bubbles have different colors, based on how the gas inside them moves. That could give clues to how the bubbles developed.
A forest flourished within 1,000 kilometers of the South Pole. That was a while ago, as in millions of years ago.
Long, long ago, in a galaxy far, far away, a black hole blasted out 100 billion times as much energy as our sun ever will. One word for that: Wow!
New data on when massive volcanic eruptions happened do not match when the dinosaur mass extinction took place.
Scientists have spotted a massive galaxy from the early universe shrouded in dust. It turned up in a small survey by the ALMA radio telescopes in Chile.
How did our moon form? Scientists are still debating the answer. It may be the result of some one big impact with Earth — or perhaps many small ones.
Geologists are making the case for a new continent, that they would dub Zealandia. It can be found largely submerged beneath the southwestern Pacific Ocean.
Scientists had thought animals were slow to emerge because they would have needed oxygen-rich air to breathe. A new study finds that plentiful oxygen may have developed early. So animals may have been late on the scene for another reason.
Scientists find different ways of exploring places humans will never visit — and drawing maps to help us better understand such mysterious places.