Facebook is in discussions to purchase Titan Aerospace, a company that makes solar-powered drones that can apparently stay up in the skies for up to five years at a time. According to Techcrunch’s sources, Facebook wants solar-powered drones to deliver sky-based internet access, with a view to building 11,000 UAVs to deliver data services, at least initially, in Africa. The drone company has confirmed that there are discussions with Facebook.