Am I a snake: my yawns spray saliva!

Why a tired moment produces a jet of saliva, and antibodies and Covid severity...
22 January 2021
Presented by Chris Smith with Azania Mosaka, Talk Radio 702. 
Production by Chris Smith.


A king cobra snake


This week, journey times to Mars, how stars come by the matter inside them, why some people feel compelled to eat paper, how coronavirus antibody levels correlate with Covid-19 severity, whether water really goes down the drain in different directions on opposite sides of the Earth, and why a yawn produces a spray of saliva. Join Dr Chris Smith and Azania Mosaka for the answers.


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