Why do we cry when we laugh?

Plus, what makes TB so drug resistant, and what's the point of going to Mars?

24 March 2023

Presented by Chris Smith with Abongile Nzelenzele, 567 CapeTalk.

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Credit:

CC0, S&B Vonlanthen, via Unsplash

Why is TB so drug resistant? How do nature drugs fit the lock and key in our brains? Why are some family members less fussy eaters than others? Why do we cry when we laugh? Is a love of public speaking from nature or nurture? What’s the point of going to Mars? Dr Chris smith and have all the answers...