Unhealthy Curiosity

If you thought doing sit-ups would give you a six-pack, think again. This episode explores the gruelling reality of competitive bodybuilding, and how a 19th century circus strongman used a tape measure, Greek statues, and a little mathematics to define the ‘perfect’ physique. (Do you measure up?)

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.

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.

This episode examines the odd biology and even odder rituals surrounding sneezing. Including sunlight sneezes, chocolate sneezes, and why on earth we feel compelled to bless them.

If you were feeling sickly 100 years ago, your doctor might have prescribed a loincloth, a bed, and a sun-drenched balcony in the Swiss Alps. No blood tests or scans — your degree of tan would determine your prognosis. From sun worship to sun-gazing to Coco Chanel accidentally making bronzed skin chic, this episode explores the many ways medicine and mankind have misunderstood the sun.

If you’ve ever heard a recording of your own voice, you may have wished for a voice transplant. But would it be possible? This episode explores why your voice is more than your voice box — and what it would actually take to sound like Elvis.

Over the centuries, doctors have tried everything to cure hiccups — from sugar to shock to what modern medicine would classify as controlled drugs and poisons. This episode looks at what hiccups actually are, why they happen, and which cures have at least some chance of working.

A strange accident in 1822 left a man with a window through his chest into his stomach. What followed was one of the most unusual series of experiments in medical history — revealing how digestion really works, and why your stomach doesn’t digest itself.

People have long warned that cracking your knuckles causes arthritis. But does it? And what actually makes the sound? This episode explores the surprisingly contentious science behind one of the body’s most divisive noises.

Within each of your ears is a fluid-filled shell left over from our aquatic past. This episode examines how hearing depends on that miniature ocean, and why excessive noise — from jet engines to blank rounds on the Die Hard set — can permanently damage it.

Teething hurts, but it is not a disease. From hare-brained remedies to modern misunderstandings, this episode explains why the correct treatment for teething is palliative — and why that’s less alarming than it sounds.

From stroke wards to boxing rings — and even airport “suspicious behaviour” lists — yawning appears at curious moments. This episode explores what it really signals, and why fatigue and boredom are the least interesting explanations.

Bad breath has existed forever. The disease halitosis, however, is newer.From Joseph Lister’s antiseptic surgery to Listerine — once sold as a floor cleaner and a treatment for gonorrhoea — this episode explores how bad breath became a disease, and what’s actually happening inside your mouth when it smells.