Why Do We Do That? 

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Ella Al-Shamahi investigates the origins of everyday human habits and behaviour.

An anthropologist's guide to the modern world. Ella Al-Shamahi investigates the origins of everyday human habits and behaviour.

Why Do We Do That? An anthropologist's guide to the modern world.

There are lots of everyday things which, when you think about them, are pretty weird. Like kissing, doomscrolling and sitting down to go to the loo. Social media may tell you to blame the latest influencer who went viral. Your therapist might tell you to blame your parents. But palaeoanthropologist Ella Al-Shamahi is here to tell you to blame your great, great, great, great, great, etc. grandparents. For some stuff at least. In this series, Ella is joined by some wonderful guests to dive into the cultural, historical and evolutionary story of everyday human habits and behaviour.

Photo: Sarah Cresswell / The Times / News Licensing

Why Do We Do That?: Why Do We Shake Hands?

Why Do We Shake Hands?

BBC Radio 4 - Why Do We Do That?, Why Do We Shake Hands?

Are we shaking hands to sniff each other?

Ella Al-Shamahi delves into the fascinating research on why we handshake.

The handshake has been threatened several times throughout history. It was even made illegal in Prescott Arizona due to the Spanish Flu — and yet we keep returning to it. In this episode, Ella Al-Shamahi delves into a possible biological explanation for why we handshake. Studies have shown that we bring our hands close to our face after a handshake, and then subconsciously take a sniff (inhalation through the nostrils doubles). The human body emits over 2000 volatile compounds that change depending on our mood, e.g. if we’re feeling scared, nervous or happy. So, do we handshake to literally sniff out the other person? Ella speaks to neuroscientist Dr Eva Mishor from Weizmann Institute of Science to hear about her fascinating studies involving hidden cameras, life-size mannequins, sweaty smells and why handshakes can help us make better decisions. Great British Bake Off star Michael Chakraverty recounts a particularly important handshake during bread week.

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