Scan day: 03 February 2014 UTC
Description: Learn it all, from smallest particles to the nature of the universe. Experts or newbies can test and increase physics knowledge. From About.com.
Announcement: Physicist Michio Kaku explores the realm beyond current knowledge - the border of science fiction and science fact. Amazingly, 95% of the make-up of the universe is stuff we can't see, according to cosmologists. Find out more about dark energy and dark matter, which far surpasses the amount of visible mass in the universe.
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Total pages in the index, 5090