In a lush conservation park in central Kenya, the world’s last three northern white rhinos are unable to breed. When they die, the subspecies will go extinct. That is unless a complex, controversial plan can save the brilliant horned beasts.
It sounds ripped out of the pages of a science fiction novel but the genetically modified, brilliantly coloured zebra fish pictured above is no fantasy. It was created by scientists, to explore one of the most elusive processes in biology: tissue regeneration. Read more >>