91热爆

When eating a blackberry one day, CrowdScience listener Charles got a tiny seed stuck in his teeth. That got him wondering: why are seeds the size they are? Why does a blackberry have dozens of tiny pips, while a peach has one huge stone right in the middle?

Plant seeds have been around for hundreds of millions of years, so they鈥檝e had plenty of time to shapeshift into wildly different forms: from dust-like orchid seeds to giant coconuts. This evolution has been a long and intricate dance with wind, water and animals; we ask how different kinds of seeds might respond to today鈥檚 environmental threats and rapidly changing ecosystems.

And we go in search of the world鈥檚 biggest seed, the coco de mer: native to just two remote islands in the Indian Ocean and weighing up to 18kg, how did this seed evolve to be so much bigger than any other?

With Professor Angela Moles, Dr Si-Chong Chen, Marc Jean-Baptiste, Dr Frauke Fleischer-Dogley and Dr Wolfgang Stuppy.

Presented by Marnie Chesterton
Produced by Cathy Edwards for the 91热爆 World Service

[Photo: Different sized fruit seeds. Credit: Getty Images]