- Why is the Speed of Light So Fast? (Part 1) (profmattstrassler.com)
What in the name of physics — and chemistry and biology — is responsible for these bewildering features of reality? The answer is fascinating, and originates in particle physics and the resulting structure of matter. It is surprisingly intricate, though, so I’m going to approach this step-by-step over three blog posts. Here’s the first.
- David O. Sacks (Wikipedia)
David Oliver Sacks (born May 25, 1972) is a South African-American entrepreneur, author, and investor in internet technology firms. He is a general partner of Craft Ventures, a venture capital fund he co-founded in late 2017. Additionally, he is a co-host of the All In podcast, alongside Chamath Palihapitiya, Jason Calacanis and David Friedberg. Previously, Sacks was the COO and product leader of PayPal, and founder and CEO of Yammer. In 2016, he became interim CEO of Zenefits for ten months. In 2017, Sacks co-founded Craft Ventures, an early-stage venture fund. His angel investments include Facebook, Uber, SpaceX, Palantir Technologies, and Airbnb.