Khosla Ventures GP @SamirKaul1 breaks down why the firm invested in @JeffDean's new startup Discovery Loop: "Jeff and his team are one-of-one. They've been at Google 27 years and now they lift their heads up to do something different. It clearly suggests that they've decided this is something very meaningful. Otherwise, why put their legacy at risk?" "It could be, what's a new material for magnets for a fusion reactor? It could be what are new materials for a solar cell to make it more…