A recent breakthrough in the race to create ‘synthetic’ embryos has sparked criticism. But the findings could be valuable in understanding miscarriages and genetic disorders
A radical technique that makes mature cells act like stem cells is growing a mini brain from tissue I donated. One day it could produce whole organs for transplant
Author of The Address Book, Tim Radford, answers the perennial question, where are we? Plus, Simon Baron-Cohen discusses a scientific test for measuring empathy
Are human embryo models a cause for hope or alarm?