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World's lightest material a possible fix for heavy problems (1:59) 

May 15 - A scientist in China has produced the lightest substance ever recorded, which he says could provide solutions to heavy problems, such as pollution control. Gao Chou says his carbon aerogel can absorb up to 900 times its own body weight, in addition to displaying other qualities that make it ideal for further development. Ben Gruber has more.

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