Jeff Bezos likes to surprise. Roaming Amazon's global headquarters in 2013, the tycoon promised a television crew half his fortune if they could guess his company's latest innovation. "Oh my God," one of his wide-eyed guests exclaimed, as they caught sight of autonomous delivery drones. Bezos, a self-declared optimist, suggested it could happen by 2017, or maybe 2018. "I know this looks like science fiction. It's not," he told 60 Minutes on CBS in 2013.

It feels like drones were built for this moment. The coronavirus pandemic has forced everyone to spend the majority of their time indoors and, where possible, maintain a healthy distance from anyone that doesn't live in the same building. Companies have introduced numerous measures to minimize the threat and spread of infection. Countless stores have acrylic screens, for instance, and many delivery drivers leave orders at your doorstep. But a robot -- or specifically, a drone -- offers a potentially safer and quicker method of exchanging goods and services. It's no wonder, then, that so many commercial UAV (unmanned aerial vehicle) operators are flourishing at the moment. In a time of crisis, they're keen to step forward and showcase the impact that drone deliveries can have on society.

If you're interested in drone deliveries, it's likely because you want your internet shopping dropped at your door within an hour of clicking "buy." And while companies like Amazon are working to make that happen, complicated logistics and thorny regulations mean it's likely to be years before you start hearing the whir of rotors on your front porch. Yet drones are already proving their worth with more urgent, medical, missions. The latest of these comes from Silicon Valley startup Matternet, which has been testing an autonomous drone network over Switzerland, shuttling blood and other medical samples between hospitals and testing facilities. "We have a vision of a distributed network, not hub and spoke, but true peer-to-peer," says Matternet CEO Andreas Raptopoulos.