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knockout mouse
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References & Edit History Related Topics
Quizzes
Sea otter (Enhydra lutris), also called great sea otter, rare, completely marine otter of the northern Pacific, usually found in kelp beds. Floats on back. Looks like sea otter laughing. saltwater otters
Animal Group Names
Lion (panthera leo)
Deadliest Animals Quiz
Mute swan with cygnet. (birds)
Match the Baby Animal to Its Mama Quiz
vulture. An adult bearded vulture at a raptor recovery center. The Gypaetus barbatus also known as the Lammergeier or Lammergeyer, is a bird of prey and considered an Old World vulture.
Animal Factoids
Related Questions
Read Next
Flying bat
Are Bats Rodents?
Collage of different cats. Made for the cat quiz on Mendel
16 Questions About Pets Answered
Rows of tassled corn in a Nebraska field. (agriculture)
Pro and Con: GMOs
Spider monkey swinging in a tree. (primate, jungle animal)
Why Do Animals Have Tails?
Genetically modified corn field. Genetically Modified Organism (GMO), transgenic corn, maize, agriculture, biological.
Do GM Foods Affect the Body Differently?
Discover
United States Presidential Election of 2012. Mitt Romney. Official portrait of President Barack Obama in the Oval Office, Dec. 6, 2012 after his reelection Nov. 6, 2012. Official portrait Obama
10 Democrats Who Made History
Ruminant. Deer. Red deer. Cervus elaphus. Buck. Stag. Antlers.
9 of the World’s Deadliest Mammals
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
The Lost Colony of Roanoke, North Carolina, where 115 people mysteriously disappeared c. 1590. John White discovers the word Croatoan carved onto a tree upon his return to the deserted Roanoke Colony in 1590
The Lost Colony of Roanoke
Malayan Leaf Frog - Megophrys nasuta
9 Animals That Look Like Leaves
Dr. Martin Luther King Jr. addresses marchers during his "I Have a Dream" speech at the Lincoln Memorial in Washington. August 28th 1963
Was Martin Luther King, Jr., a Republican or a Democrat?
World Data Locator Map: Australia
Is Australia an Island?

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Related Topics and References

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Key People

Smithies, Oliver
Oliver Smithies
American scientist
Martin Evans
Martin Evans
British scientist
Mario R. Capecchi
American scientist

Related Quizzes and Features

Quiz
Lion (panthera leo)
Deadliest Animals Quiz
Mute swan with cygnet. (birds)
Match the Baby Animal to Its Mama Quiz
vulture. An adult bearded vulture at a raptor recovery center. The Gypaetus barbatus also known as the Lammergeier or Lammergeyer, is a bird of prey and considered an Old World vulture.
Animal Factoids
Sea otter (Enhydra lutris), also called great sea otter, rare, completely marine otter of the northern Pacific, usually found in kelp beds. Floats on back. Looks like sea otter laughing. saltwater otters
Animal Group Names