krypton-85

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American bison (Bison bison) also known as buffalo or plains buffalo on the prairie, western U.S.

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Wolfgang Amadeus Mozart. Mozart rehearsing his 12th Mass with singer and musician. (Austrian composer. (Johann Chrysostom Wolfgang Amadeus Mozart)

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cloning. First cloned cat. First cloned companion animal. CC (copy cat) female domestic shorthair cat (b. Dec. 22, 2001) photo Jan. 18, 2002. Cloned at Texas A&M Univ. College of Vet. Med. & Biomedical Sciences. Reproductive cloning genetics DNA cc cat

CC, The First Cloned Cat

United States electoral college map showing number of electoral votes by state.

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Snowshoe hare (Lepus americanus) with its Summer coat on the left side and its winter coat on the right.

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Andrew Jackson delivering a speech while on his way to Washington, D.C., for his inauguration in 1829. From Harper's Weekly, 1881.

5 Remarkably Close U.S. Presidential Elections

krypton-85

isotope

Learn about this topic in these articles:

properties of krypton

In krypton: Properties of the element
…contains only one radioactive isotope, krypton-85, which has a half-life of 10.7 years, because all the other radioactive isotopes have half-lives of 3 hours or less.
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