Science Fair Project Encyclopedia
39th century BC
(40th century BC - 39th century BC - 38th century BC - other centuries)
(5th millennium BC - 4th millennium BC - 3rd millennium BC)
Events
- Construction in England of the Sweet Track, the World's first known engineered roadway.
Significant persons
Inventions, discoveries, introductions
10-26-2009 08:16:03
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The contents of this article is licensed from www.wikipedia.org under the GNU Free Documentation License. Click here to see the transparent copy and copyright details


