Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
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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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Some farmers in Kenya are using elephants' natural fear of bees and building "beehive fences" that keep wild elephants from trampling the crops. It keeps the farms safe, and prevents farmers from having to kill elephants to defend their livelihood!
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India's richest person, Mukesh Ambani, built a $1 billion home. It has 27 habitable floors, including six parking floors with a capacity to hold up to 168 cars. 600 staff maintain the home.
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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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