Earth may have a pair of 'ghost moons' made of dust trapped in orbit
29 October 2018
Photographs show signs of a ghost moon, a translucent gas cloud that orbits Earth along with our moon. But some say the images are not definitive
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Premium
There is a weird new state of matter that can't be stirred or pushed
29 October 2018
Rigid light is a strange new state of matter. It’s somewhere between a solid and a superfluid, and can’t be stirred, rotated, or even pushed
The Higgs boson may have stopped the early universe from collapsing
27 October 2018
Moments after the big bang, calculations show the universe could have collapsed into black holes. The reason it didn’t could be explained by the Higgs boson
Zapping liquid metal makes it move in a way that can power wheels
25 October 2018
A small metal droplet can propel a wheeled robot forward, paving the way for larger robots that can trundle like tumbleweeds through unfriendly terrain
