Few human characteristics have caused as much conflict as skin colour, but what is the evolutionary driver for the colour of our skin? Researchers studying vitamin D have found that not only is the vitamin essential to staying alive it may also be the reason some populations are black and some are white.

To watch all the videos in this series, please click below –

The Origins of Language
What Makes Us Human – https://youtu.be/7vC7NZALZh0
White and Black – https://youtu.be/9oKlK1NuykI
Asian Chicken Salad – Tonic Food Fix – https://youtu.be/t6bXT2KfPYY

For more on Tonic New Season 2016 – https://youtu.be/sjYFMgaxu30

Tonic TV | T-S120 | S05E03