A pig's brain has been frozen with its cellular activity locked in place

Related Stories

• It’s been 20 years since the first tweet
• Why western carmakers' retreat from electric risks dooming them to irrelevance
• ‘It’s stupid’: why western carmakers’ retreat from electric risks dooming them to irrelevance
• An early contender for movie of the year
• We keep finding the raw material of DNA in asteroids—what's it telling us?