When Flight Attendants Started Sweating Blood

How Long Can You Stay Awake?

In one experiment, a man who didn't sleep for a week ended up sobbing about an imaginary gorilla. This episode explores what science has uncovered about the effects of sleep deprivation, from hallucinations to frank psychosis – and whether the brain recovers afterwards.

The Doctor Who Invented Corn Flakes

The inventor of Corn Flakes believed cinnamon was morally suspicious and flavour was a threat to virtue. This episode explores the strange story of John Harvey Kellogg, his wellness empire, his obsession with chewing, vibrating chairs for constipation, and why evolution made flavour far too appealing for his crusade to succeed.

When Flight Attendants Started Sweating Blood

In 1980, flight attendants began apparently sweating blood on flights between New York and Florida. The CDC investigated. The explanation was not what anyone expected. Also featuring blue sweat, pink sweat, and the only diagnostic dilemma ever solved by a dermatologist ringing a snack-food manufacturer.

Why Do We Itch? The Itchy and Scratchy Show

This episode explores the biology of itching. Including NASA’s emergency Velcro patches, exploding lice in World War I trenches, contagious scratching, "amphetamites", mosquito mouth-javelins, and the imaginary insects produced by the human brain itself.

What Does Your Urine Say About You?

This episode explores what urine can reveal about you — from pregnancy and diabetes to drugs, disease, and genetic disorders. Including ancient Egyptian pregnancy tests, beetroot-induced panic, blue urine pranks, and why IKEA once asked women to wee on their catalogue.