The hole in the soda can tab is actually used to hold a straw in place and stop it from rising.
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There's a regenerative candle that creates a new candle as it melts.
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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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Between 2007 and 2012, Bill Gates gave away $28 billion; saving 6 million lives.
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MDIF, a New York based non-profit organisation, is planning to beam free Wi-Fi to the entire world from space.
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