So, if you think Amazon Drone is pretty amazing, check out this little secret drone project from Google, Project Wing. Watch how the delivery is done. Very convenient, in my opinion as it need not land the drone.
Stuff did a nice write up on this Project Wing. I prefer just to watch this video.
Basically, it did a control drop while hovering above. What do you think? Impressive?
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(source via brainopera (Thanks, bro))
(source2)