Only one of my bottles of water froze

What is ice nucleation? Is phlegm safe to swallow? And what's the ideal healthy human diet?
17 January 2020
Presented by Chris Smith with Kieno Kammies, 567 CapeTalk. 
Production by Chris Smith.


Ice crystals


This week, why only one bottle of water froze while others remained liquid; do hot drinks cool you down? What's phlegm and is it safe to swallow? Is human body temperature changing? How did the NASA student intern discover an exoplanet? Are fizzy drinks safe for diverticular disease? And what's the ideal healthy diet for a human? Join Dr Chris and Kieno Kammies to find out...


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