This has never been observed before. For the first time in history, scientists are watching an alien comet fall apart. The object comes from beyond our Solar System and has traveled for billions of ...

Determining if heavier objects really fall faster than lighter ones or if gravity affects them equally. Brown mass shooting update: Person of interest identified—report Coldplay kiss cam woman breaks ...

The original version of this story appeared in Quanta Magazine. Here’s a test for infants: Show them a glass of water on a desk. Hide it behind a wooden board. Now move the board toward the glass. If ...