Forbes (Sept. 10) -- An electric aircraft startup, Impossible Aerospace, has emerged from stealth mode with a quadcopter drone that it says can stay aloft for two hours, roughly four times as long as other electric drones. “It's not so much an aircraft as it is a flying battery,” says founder and CEO Spencer Gore, who previously worked as a battery engineer at Tesla. Gore, 26, studied aerospace engineering at Illinois before switching his major to engineering physics.