Society Race is a social construct, but racism can cause real biological harm Research exploring the effects of racism on the brain suggests there is reason to be concerned about potential long-term damage, finds Layal Liverpool Comment Subscriber-only
Mathematics Mathematicians can't agree what 'equals' means, and that's a problem News Subscriber-only
Space An already dead star is dying for a second time A pulsar, the spinning remnants of a star that blew up in a supernova, has been spotted rotating at a comparatively slow rate of once every 54 minutes. That means it may be about to cross the "death-line" - the first time we have seen one of these stars die a second death News Subscriber-only