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Periodiek systeem der elementen
[http://www.lenntech.nl/periodiek/periodiek-systeem.htm] - - public:Trinsec
Periodiek systeem der chemische elementen
Language may shape human thought - 19 August 2004 - New Scientist
[http://www.newscientist.com/article.ns?id=dn6303] - - public:Trinsec
Being able to talk about something may define understanding, suggests a counting study in tribal people without words for higher numbers
Your Weight On Other Worlds
[http://www.exploratorium.edu/ronh/weight/] - - public:Trinsec
Ever wonder what you might weigh on Mars or The Moon? Here's your chance to find out.
HowStuffWorks - Learn how Everything Works!
[http://www.howstuffworks.com] - - public:Trinsec
The index to hundreds of fantastic 'How Stuff Works' articles!