A chimpanzee cataract surgery has restored sight to a 54-year-old who went blind, after months of training him to present his eyes.

A lottery winner who scooped $155 million has given roughly half of it to charity through a family trust, inspired by Dolly Parton.

A psilocybin chemotherapy study found the psychedelic protected mice from lasting nerve damage through six rounds of treatment. Human trials are next.