This drone has one propeller and no life purpose

The poor Monospinner has accomplished quite the feat — it can fly with just one propeller — but lacks a point. Yes, it's an engineering marvel and proof of concept, but we can't even use it to take sick videos or spy on our enemies. The Monospinner is the "mechanically simplest controllable flying machine in existence," according to its creators, but is confined to its padded blue room, like some kind of caged animal. Maybe one day Monospinner will be free.

• ViaGizmodo
• SourceETH Zurich Flying Machine Arena