A bumper edition

A bumper edition

From Unexpected Elements by BBC World Service

March 27, 2026 · 49 min

About this episode

The episode explores various scientific phenomena inspired by recent incidents in Japan, including cellular matchmaking, bird flock behavior, and asteroid collision prevention.

Japanese pedestrians have been forcefully colliding with each other in a spate of butsukari otoko – or ‘bumping man’ – incidents and the Unexpected Elements team has been inspired to investigate some bumpy science. First, what does your heart desire? Well, at a cellular level, the perfect match! We hear how your heart is built by cells going speed dating. Then, we discuss how birds avoid in-flock collisions, and we learn all about mesmerising murmurations. Next, we’re joined by science journalist and author Robin George Andrews, who tells us about NASA’s mission to avoid a city-killing disaster by bumping into an asteroid before it can bump into us. Also, a colourful question about migraines, a surprising new treatment for them, and the scientists who took antimatter for a test drive. All that, plus many more Unexpected Elements. Presenter: Marnie Chesterton Producers: Sophie Ormiston, with Ella Hubber, Katie Tomsett, Imy Harper and Lucy Davies

People in this episode

Host: Marnie Chesterton

Guest: Robin George Andrews

Topics covered

  • bumping incidents
  • cellular biology
  • bird behavior
  • asteroid collision
  • migraines
  • antimatter

Keywords

  • butsukari otoko
  • heart cells
  • murmurations
  • NASA
  • asteroid
  • migraines
  • antimatter

Mentioned in this episode

Organizations: NASA

Places: Japan

More episodes of Unexpected Elements

Explore listener stats, chart rankings, contacts and more on the Unexpected Elements podcast page.