Scientists taking 'active measures' for asteroid with slight chance of hitting earth.
YR4 has just above a 1% chance of crashing into Earth in 2032, which is why astronomers and space agencies are paying attention to it.
Science news this week: 'Impossible' black holes and Antarctica's hidden 'plumbing'
Our weekly roundup of the latest science in the news, as well as a few fascinating articles to keep you entertained over the ...