Tigers can reach a length of up to 3.3 metres (11 feet) and weigh as much as 300 kilograms (660 pounds).

Following directions off the Internet and chemicals obtained from a mail order company, a team of U.S. scientists created an identical copy of the polio virus.

The Library of Congress in Washington, D.C. has the worlds largest collection of comic books with over 5,000 titles and 100,000 issues.

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