Sam Altman asked Elon Musk what he would work in if he were 22 today.

This is a clip from a longer interview, which you can watch here:    • Elon Musk : How to Build the Future  

Chapters (Powered by https://bit.ly/chapterme-yc)
00:00:00 Intro
00:00:06 If 22, problems you will work on?
00:00:55 AI
00:01:41 Genetics
00:02:06 High bandwidth interface to the brain