More specifically, rather than provide a long manifesto of the theory behind lean startup, Udacity breaks down the process of launching a business into practical steps for systematically testing hypotheses and developing a business plan that will actually work.
First, it has become practical to use IT to automate and semi-automate many aspects of the testing process, which lowers the cost of testing enormously.
Geothermal energy is buried miles deep underground and is, for all practical purposes, impossible to find without a fair amount of technical knowledge, testing and so forth.