Do you have any sunscreen?

I had invented DryBath, the world's first bath substituting lotion.

So melanin was recruited, in our lineage, and specifically in our earliest ancestors evolving in Africa, to be a natural sunscreen.

Mostly, a baseball cap, rowing gloves and a smile or a frown, depending on whether I went backwards overnight and lots of sun lotion.

So, living at the equator, we got lots and lots of ultraviolet radiation and the melanin this wonderful, complex, ancient polymer compound in our skin served as a superb natural sunscreen.

Then if you look around you in the bathroom, you see lots more products like shampoo, conditioner, anti wrinkle cream, body lotion, Then, so, before breakfast, you've already met the pig so many times.

For a full year, A.J. Jacobs followed every piece of health advice he could from applying sunscreen by the shot glass to wearing a bicycle helmet while shopping. Onstage at TEDMED, he shares the surprising things he learned.

The memo cites a female interrogator rubbing lotion on a shackled detainee and whispering in his ear during Ramadan when sexual contact with a strange woman would be most offensive then suddenly bending back his thumbs until he grimaced in pain, and violently grabbing his genitals.

If you had to walk a mile for a jug of water every day, as millions of people do, it's unlikely you'd use that precious water to bathe. Young entrepreneur Ludwick Marishane tells the amazing, funny story of how he invented a cheap, clean and convenient solution DryBath, the world s first bath substituting lotion.