The gas that gives rotten eggs their distinctive foul smell may slow ageing and block damaging chemical reactions inside cells, according to scientists in China.
5
Scientists at the Zhejiang University in China have developed an ultra-light material known as carbon aerogel.
3
Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
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Nylon is made from coal and petroleum.
42
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
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Iron weighs more after it rusts.
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One barrel of petroleum holds 42 gallons.
20
The only letter not appearing on the Periodic Table is the letter "J".
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