The “tech world” is really more of a “tech family.” Between digital giants’ appetites for acquisitions and the tendency of their ex-employees to start new companies, it’s easy to see how nearly every blip in the ecosystem is closely related. See this infographic for an insight into those interconnections.
As I just read an article in German’s “Die Zeit” on serial entrepreneur Elon Musk and his adventure to travel to mars.
Elon Musk was one of the founders of Pay Pal and is an investor in several solar & cleantech companies and the coolest thing: Tesla. Seems that internet business is not interesting enough for some people
There is also a comprehensive interview on youtube: