Sorry folks: 'Alien' signal from Proxima Centauri was likely just a broken computer on Earth

Mysterious 'alien beacon' was false alarm - Radio signal seemed to originate from the star Proxima Centauri, and provided a helpful drill for future searches

Earth will warm by 2.7°C under net-zero pledges made ahead of COP26

Earth tipped on its side (and back again) in 'cosmic yo-yo' 84 million years ago