What could El Niño mean for winter weather in the US and Canada?

Elon Musk’s company will try to grab both parts of the rocket for the first time.

There is almost nowhere on Earth free from disruptive human noise – but it's one of the easiest environmental problems to solve

The polar vortex winds have undergone an unprecedented weakening, which could bring cold weather to Europe. Some scientists suspect the record El Niño is to blame

Quantum clocks usually rely on advanced lasers and isolated atoms in the lab, but a new experiment showed that the same clock design can work with sunlight instead