A very interesting interview with Jeff Bezos. Currently listening to him talk about friction stir welding – a type of metal welding involving friction and mixing, which I had never heard of before. Bezos also explains why he didn’t choose theoretical physics. He says there are some magical guys who manage to solve differential equations in their minds in ten seconds ending up with a cosine, and then it takes three pages of fine print to explain it to normal people. He cites a college colleague as an example. To which this colleague comments on the video saying that he is Yasantha, Jeff’s college friend from Princeton, who solved the cosine problem for him, and is very grateful for the warm words about their interaction over 40 years ago, who is also an inventor in Silicon Valley, and a scientist in the field of artificial intelligence (I googled it, it’s Yasantha Rajakarunanayake). In general, it’s quite cool, watching it while walking the dog, I recommend
P.S. It’s only about engineering at the beginning, then it covers life and business. Also interesting.

