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placental mammal
Table of Contents
Introduction References & Edit History Quick Facts & Related Topics
Images & Videos
Capybara
A pangolin walks through grass with a blue circle around it and the word "endangered" written in white across the image.
mammal phylogeny parallel evolution of marsupial and placental mammals Tree of life illustrating the three-domain classification of life-forms
Quizzes
Dromedary camels (Camelus dromedarius). Animals, mammals.
Ultimate 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
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
Read Next
animal. Amphibian. Frog. Anura. Ranidae. Frog in grass.
Abundant Animals: The Most Numerous Organisms in the World
Spider monkey swinging in a tree. (primate, jungle animal)
Why Do Animals Have Tails?
Flying bat
Are Bats Rodents?
American bison (Bison bison) also known as buffalo or plains buffalo on the prairie, western U.S.
What’s the Difference Between Bison and Buffalo?
Collage of different cats. Made for the cat quiz on Mendel
16 Questions About Pets Answered
Discover
Lusitania sinking, illustration from The War of the Nations (New York), December 31, 1919. World War I, WWI. This image is one of three on the page. (See source file for the other two.)
7 of the World’s Deadliest Shipwrecks
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?
Shah Jahan. Taj Mahal. Mughal architecture. Emperor Shah Jahan fifth Mughal Emperor (reigned 1628-1658) India, Himachal Pradesh, Basohli or Jammu and Kashmir, Mankot, circa 1690 Drawings; Opaque watercolor, gold, and ink on paper (see notes)
6 Important Mughal Emperors
Close up of books. Stack of books, pile of books, literature, reading. Homepage 2010, arts and entertainment, history and society
12 Novels Considered the “Greatest Book Ever Written”
illustration of the walking titanosaurus, Patagotitan mayorum
Titanosaurs: 8 of the World's Biggest Dinosaurs
King Cobra snake in Malaysia. (reptile)
9 of the World’s Deadliest Snakes
Fish. Lionfish. Lion-fish. Turkey fish. Fire-fish. Red lionfish. Pterois volitans. Venomous fin spines. Coral reefs. Underwater. Ocean. Red lionfish swims by seaweed.
10 of the World’s Most Dangerous Fish

placental mammal: Media

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Videos

Meet the endangered pangolin
The pangolin is the only mammal in the world covered in scales.
Video: Encyclopædia Britannica, Inc.

Images

Capybara
Adult capybara (Hydrochoerus hydrochaeris) with her young.
© Stephen Meese/stock.adobe.com
mammal phylogeny
Mammal phylogeny.
Encyclopædia Britannica, Inc.
parallel evolution of marsupial and placental mammals
Parallel evolution of marsupial mammals in Australia and placental mammals on other...
Encyclopædia Britannica, Inc.
Tree of life illustrating the three-domain classification of life-forms
The tree of life according to the three-domain system of biological classification.
Encyclopædia Britannica, Inc.
VIEW MORE in these related Britannica articles: