Astronomers scramble as ‘alien megastructure’ star dims again
19 May 2017
Tabby’s star’s weird behaviour has been blamed on everything from asteroids to aliens. Now astronomers are racing to watch its dimming in action
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Premium
LIGO could detect gravitational waves’ permanent space-time warp
19 May 2017
When gravitational waves permanently distort space-time, it causes a “memory” signal – which may help LIGO find some of the universe’s most exotic objects
Titan’s riverbeds show a terrain built more like Mars than Earth
18 May 2017
Saturn’s largest moon resembles Earth with its rivers and mountains, but it came by its topography very differently - and could still be active today
