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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
Young chimpanzee dressed in a shirt and sweater vest, scratching his head thinking. (primates)
Wild Words from the Animal Kingdom Vocabulary 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
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animal. Amphibian. Frog. Anura. Ranidae. Frog in grass.
Abundant Animals: The Most Numerous Organisms in the World
Collage of different cats. Made for the cat quiz on Mendel
16 Questions About Pets Answered
cat. orange and white persian cat with long hair, snarl, growl, teeth
7 Questions About Mammals Answered
Spider monkey swinging in a tree. (primate, jungle animal)
Why Do Animals Have Tails?
Discover
Small, white rat (genus Rattus) on a glass table. (rodent, laboratory, experiment)
Cruel and Unusual Punishments: 15 Types of Torture
Easter Procession of Maria Santisima del Sacromonte in Granada, Spain. This statue is known as Virgen de los Gitanos or The Virgin of the Gypsies.
What is Holy Week?
illustration of the walking titanosaurus, Patagotitan mayorum
Titanosaurs: 8 of the World's Biggest Dinosaurs
Entrants falling and tumbling over while chasing the cheese at the 2016 'Cheese Rolling' held at Cooper's Hill, in the Cotswolds, Brockworth England
7 of the World’s Most Dangerous Festivals
Illustration for Demystified "How Dangerous is Quicksand"
How Deadly Is Quicksand?
July, 2006, Launch of Space Shuttle Discovery STS-121. See attached for full caption information.
Will Light-Speed Space Travel Ever Be Possible?
Battle of the Alamo from "Texas: An Epitome of Texas History from the Filibustering and Revolutionary Eras to the Independence of the Republic, 1897. Texas Revolution, Texas revolt, Texas independence, Texas history.
6 Wars of Independence

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A tardigrade protein helped reduce radiation damage in mice • Mar. 25, 2025, 6:13 AM ET (Science News)

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Key People

Ryuzo Yanagimachi
American scientist
Charles Elton
English biologist

Related Quizzes and Features

Quiz
Young chimpanzee dressed in a shirt and sweater vest, scratching his head thinking. (primates)
Wild Words from the Animal Kingdom Vocabulary Quiz
Giraffe standing in grass, Kenya.
Know Your Mammals Quiz
Lion (panthera leo)
Deadliest Animals Quiz
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
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
Mute swan with cygnet. (birds)
Match the Baby Animal to Its Mama Quiz
List
cat. orange and white persian cat with long hair, snarl, growl, teeth
7 Questions About Mammals Answered
animal. Amphibian. Frog. Anura. Ranidae. Frog in grass.
Abundant Animals: The Most Numerous Organisms in the World
Collage of different cats. Made for the cat quiz on Mendel
16 Questions About Pets Answered