Happy Friday, readers! We love a good origin story, don’t we? We have an innate desire to understand how things came to be. Whether it’s an individual, a company, an entire society — beginnings are always intriguing. Today’s newsletter features two brand new books all about origins. The first is about the entrepreneurial origins of the two companies that eventually merged to become PayPal. The second is technically about an ending (the extinction of the dinosaurs), but actually more about how our own species came to be in that aftermath.