How do plants know which way is up?

Also, can exfoliators remove your fingerprints? And what are hiccups?

24 January 2025

Presented by Chris Smith with Dan Corder, 567 CapeTalk.

SEEDLING

Credit:

Public Domain

How can you use sticks to calculate the circumference of the Earth? Can exfoliators remove your fingerprints? How do plants know which way is up? What dictates the pattern of a cat's stripes? What are hiccups? Can mosquitoes see you? Dr Chris Smith and Dan Corder have all the answers...