Why does human hair go grey and is it ever possible for it to go white overnight from shock? Hannah and Adam explore why hair goes grey, how much stressful life events and a lack of sleep can speed up the process. They hear from the pilot whose hair turned white after a flight where all 4 of his engines failed after flying through a volcanic ash cloud - was the shock responsible? They also uncover new research which has shown it's possible for greying hair to return to its natural colour and ask if this finding could be exploited to uncover a cosmetic way to reverse hair greying?

“I shall largely speak of mice,” the paper begins “but my thoughts are on man.”So begins a truly extraordinary scientific paper, and an equally extraordinary story.“Death Squared: The Explosive Growth and Demise of a Mouse Population.” was published in 1973 by John Calhoun, and i ... Show More

In July 2024 a startling scientific paper was published.Headlined ‘Evidence of dark oxygen production at the abyssal seafloor’, scientists told how they had discovered oxygen being made two and a half miles down, at the bottom of the Pacific Ocean.Their claim centred on small pol ... Show More

The rapid spread of antibiotic resistant bacteria is already claiming lives - and a far greater global crisis is on the horizon.In this three part series for Discovery, reporter Roland Pease traces how we reached this point, uncovers the forces driving resistance ever faster, and ... Show More

Discovering your first grey hair can be quite the shock. After all, it marks the onset of an irreversible change. And the fact that it’s a natural process is often of little consolation. The culprits, if you want to think about it like that, behind our hair turning grey are the ... Show More

#187 This episode of 'Chemistry for Your Life' delves into the fascinating world of gray hair, exploring its chemistry and biological processes. Hosts Melissa and Jam share personal anecdotes about encountering gray hair before diving into a detailed ex ... Show More

As a kid, host Aaron Scott would dress up for Halloween as an older version of himself — complete with a cane, a set of polyester britches and painted gray hair. These days, that costume is becoming a bit more of a day-to-day reality. At least, the gray hair is. So today, in hono ... Show More

Hair is an important part of our identities – straight, frizzy, long, not there at all – and our efforts to keep it styled and clean have created an $80 billion hair care industry. Many products offer to improve the life of the stuff on our heads, but isn't it all just dead pr ... Show More

Why do people start losing the pigment in their hair as they grow older? Well, it might be one of those things that we don't entirely understand, though there are some new studies that offer some ideas. But that didn't stop people throughout history from trying to find ways to ... Show More

Have you ever wondered why waterfalls appear white when still water is transparent? Why clouds, or snow, appear white when they too are essentially just water molecules in different states? What makes something white, opaque or transparent? These are the questions CrowdScience ... Show More

Compared to the entirety of human existence, our history of flying in aeroplanes is very short indeed. So what does this fast form of travel do to bodies that have evolved for land-based living? That's what listener Sofia wants to know after working as a flight attendant for o ... Show More

"You have the power to pick what serves you, and what no longer serves you," says hair stylist & colorist Christin Brown—and that includes hair color, we might add. In this episode of Clean Beauty School, host and mindbodygreen's beauty director Alexandra Engler chats with Brown ... Show More

The Shocking White Hair