Take a look at the amazing speed of these little creatures in this video - don't blink!
Obviously, this is not an sf invention or technology, but I do enjoy presenting these Beyond Technovelgy items from time to time, showing other sources for sf inspiration. See the interesting source article at Aquaviews; thanks to Adi for the tip.
Scroll down for more stories in the same category. (Story submitted 10/7/2010)
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Sky City's 220 Stories Are Go
'It rested among green parklands and... stood in total isolation, a glittering block of whites and flashing windows dotted with colors.'
Robo-Raven Flapping Wing Robot Bird
'When he had first built them, they had been crude indeed, flying mechanisms with little more than a reflex-response unit.'