TechCrunch recently reported that Facebook is in talks to acquire Titan Aerospace, a drone-production company that has just started taking orders for its Solara 50. The drone is designed to fly at 65,000 feet, remaining above terrestrial weather. A typical launch sequence is initiated just after midnight, and the aircraft climbs under its own battery power. The Solara reaches altitude as the sun crests over the horizon and enters its standard day-night cycle. When the sun sets, the Solara shifts its propulsion, payload and systems to its battery banks. A battery-management system ensures voltage is maintained in the subzero atmosphere. It is designed to stay aloft for five years with a range or 2.5 million miles. Read related article.

Source: TechCrunch and Titan Aerospace | Hayley Tsukayama and Richard Johnson / The Washington Post