Scientists believe they have discovered the first known triple black hole system in the Universe and then watched it die.

Scientists suggest that an unusual pair of colliding black holes, initially spotted in 20
Scientists suggest that an unusual pair of colliding black holes, initially spotted in 20
Some studies have linked regular cannabis use to an increased risk of certain cancers. What's the reason? (Image: Catherine Falls Advertising/Getty Images) Cannabis smoke may be perceived as less aggressive than tobacco smoke, but this impression can be misleading. Current…
Researchers studied the Freda Formation near Wisconsin's Potato River Falls to gain a better understanding of the evolution of Earth's landforms. (Photo: Anthony Fuentes) About 1.1 billion years ago, the oldest and most tectonically stable part of North America, known…
The total lunar eclipse of March 14, 20
This image of scurrying penguins in Antarctic waters has been shortlisted for the 20
Timber rattlesnakes have potent venom, but rarely bite humans unless provoked or stepped on. (Image credit: Kristianbell via Getty Images) A Tennessee tourist recently died after being bitten by a rattlesnake and suffering a rare allergic reaction to the snake's…