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Flower. Fruit tree. Cherry. Cherry tree. Cherry blossom. Spring. Close-up of cherry blossoms in bloom.

The Perils of an Early Spring

Earth from space. Full-hemisphere views of the Earth showing Hurricane Linda at its peak approaching Baja California on 1997 September 11.

What Is Earth’s Velocity?

September 11, 2005, ozone thinning over antarctica reached its maximum extent for the year.

Is the Ozone Layer Finally Healing Itself?

High-oblique view of the extra-tropical unnamed cyclone that merged with Hurricane Earl is featured in this image taken by an Expedition 24 crew member on the International Space Station (Sept. 2010).

Is the Number of Hurricanes Increasing?

Lightning over the outskirts of Oradea, Rom., during the thunderstorm of August 17, 2005.

16 Questions About Earth’s Atmsophere and Weather Answered

Discover

Aurochs. Bos primigenius. Skeleton. Extinct animal. Skeleton of an Aurochs, an extinct wild ox.

6 Animals We Ate Into Extinction

Thumbnail for flags that look alike quiz Russia, Slovenia, Iceland, Norway

Flags That Look Alike

Space race (1957-1969) infographic between United States (U.S.) and Russia. America, Soviet Union, U.S.S.R., space exploration

Timeline of the Space Race, 1957–69

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

Close up of praying mantis walking on stone ground against a blurred background in Japan

6 Animals That Eat Their Mates

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

Figure 13: A Maxim machine gun, belt-fed and water-cooled, operated by German infantrymen, World War I.

7 Deadliest Weapons in History

simoom: Facts & Related Content

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Facts

Also Known As	Samum • poison wind

Topics

local wind system etesian wind haboob khamsin katabatic wind levanter gregale anabatic wind shamal sirocco

Quiz

Lightning over a farm field. Weather electricity thunderstorm light energy tree

Facts You Should Know: Weather Quiz

Umbrella colored like a rainbow sticking out above a sea of black umbrellas while it rains. (storm, weather)

Weather Words Vocabulary Quiz

rain. Child in the rain, wearing a rain coat, under a yellow umbrella. April Showers weather climate rain storm water drops

April Showers to March’s Lions and Lambs