Eyes on the skies

From Geometric Analysis Reveals How Birds Mastered Flight:

Many of the somersaulting, spinning and plummeting maneuvers that birds have mastered aren’t ones that anyone would want to experience in a passenger aircraft. But uncrewed aerial vehicles, also known as UAVs or drones, are freer to make drastic maneuvers, and their increasing popularity for military, scientific, recreational and other uses is creating more opportunities for them to do so.

At the very least, drone-watching seems as if it'll get more interesting¹ as drones swoop in from an unexpected angle and bank hard at the last second to kill their speed and change their direction before landing with an attention-seeking flourish on the drone-pad next to your front door.

[Via Sentiers 230]