http://einestages.spiegel.de/externa...#featuredEntry
http://einestages.spiegel.de/externa...#featuredEntry
wish i was old enough to have seen that!
http://einestages.spiegel.de/externa...#featuredEntry
http://einestages.spiegel.de/externa...#featuredEntry
wish i was old enough to have seen that!
it is mathematically impossible for either hummingbirds, or helicopters to fly. fortunately, neither are aware of this.
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