Hesperorthis

Table of Contents

Introduction References & Edit History Related Topics

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4:045 Dinosaurs: Monsters of the Past, Tyrannosaur, Trachodon, Triceratops

A Journey Through Time Since the Precambrian

Portrait of a mountain gorilla at a short distance. gorilla close up portrait.The mountain gorilla (Gorilla beringei beringei)

Falling Stars: 10 of the Most Famous Endangered Species

Artist interpretation of space asteroids impacting earth and moon. Meteoroids, meteor impact, end of the world, danger, destruction, dinosaur extinct, Judgement Day, Doomsday Predictions, comet

Major Mass Extinctions

Japanese spider crab

10 Animals With Evolutionary Traits Plucked Straight Out of a Nightmare

Malayan Leaf Frog - Megophrys nasuta

9 Animals That Look Like Leaves

Discover

Dancers at a Cinco de Mayo festival at the Mission District, San Francisco, California. (Photo dated 2019.) holidays

Is Cinco de Mayo Mexico's Independence Day?

Amendments 1-10 to the Constitution of the United States constitute what is known as the Bill of Rights on an American flag.

What Is the Emoluments Clause?

King Cobra snake in Malaysia. (reptile)

9 of the World’s Deadliest Snakes

Ethel Rosenberg arrested in August 1950. Photograph dated Aug. 8, 1950. American civilians executed for espionage. Spies, communists, Julius Rosenberg

Spies Like Us: 10 Famous Names in the Espionage Game

Poker game. Card game. Royal Flush in poker. Hearts suit gambling

Poker Hands Ranked

Cathedrale St.Jean in Lyon, France has a 14th-century astronomical clock that shows religious feast days till the year 2019; Perpetual Calendar

Ten Days That Vanished: The Switch to the Gregorian Calendar

Shadow of a man holding large knife in his hand inside of some dark, spooky buiding

7 of History's Most Notorious Serial Killers

Hesperorthis: Related Content

Written and fact-checked by The Information Architects of Encyclopaedia Britannica

Topics

Ordovician Period lamp shells fossil Tetractinella Atrypa Neospirifer Chonetes Mucrospirifer Dielasma Platystrophia Rensselaeria Tropidoleptus Leptodus

Quiz

Mute swan with cygnet. (birds)

Match the Baby Animal to Its Mama 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

Lion (panthera leo)

Deadliest Animals Quiz