A miniaturised "brain-in-a-bottle" has been grown by stem cell scientists who hope it will lead to new treatments for neurological and mental diseases.
The tiny hollow "organoids", measuring three to four millimetres across, have a structure similar to that of an immature human brain, including defined regions.
But the scientists insist they are still far from the science fiction fantasy of building a working artificial brain - or even replacement parts for damaged brains.
More top news
The two brightest planets in the solar system will appear close to collision tonight, an illusion caused by line of sight.
US superstore apologises after a customer who had his request for a Confederate flag cake rejected managed to get an ISIS flag cake instead.
After Heather Watson becomes the latest tennis star reprimanded for 'audible obscenity', we ask - what happens to the players who swear?