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The snowman is 10 µm across, 1/5th the width of a human hair...
http://www.npl.co.uk/educate-explore/christmas/
3 comments
17/12/2009
reddit.com
The snowman is 10 µm across, 1/5th the width of a human hair.
http://www.npl.co.uk/educate-explore/christmas/
15 comments
4/12/2009
science