The Gate Tower Building skyscraper in Japan has a highway passing through its fifth, sixth and seventh floors.
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Crows living in some urban areas drop nuts into traffic to let the passing cars crush them, then they wait for the red lights to stop the traffic so they can grab and eat it.
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Scientists at the Zhejiang University in China have developed an ultra-light material known as carbon aerogel.
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It's possible to train your cat to use the toilet as a litter box and even flush afterwards.
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Leonardo Da Vinci made a robotic lion in 1515 that would walk, sway, open its mouth and move its tail - it even had a compartment that opened to present flowers.
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MIT has developed a camera that captures the speed of light at a trillion frames per second.
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