These (birdlike drones) absolutely terrify me because once they can sense thermal upcurrents, they'll be able to loiter for significant periods of time. Plus th

These (birdlike drones) absolutely terrify me because once they can sense thermal upcurrents, they'll be able to loiter for significant periods of time. Plus they're incredibly agile: https://www.youtube.com/watch?v=TXg-qoRN0co https://www.youtube.com/watch?v=TXg-qoRN0co