from the BBC, with video:
http://news.bbc.co.uk/2/hi/science/nature/8632572.stm
it's a pretty rudimentary test, but it's a good example.
from the BBC, with video:
http://news.bbc.co.uk/2/hi/science/nature/8632572.stm
it's a pretty rudimentary test, but it's a good example.
it is mathematically impossible for either hummingbirds, or helicopters to fly. fortunately, neither are aware of this.
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