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rainbow
Understand the science of appearance of different colors of the rainbow
wind bending palm trees rainbow
Know how rainbows are formed
Understand the science behind the formation of rainbows
Quizzes
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
Related Questions
Read Next
Lightning over the outskirts of Oradea, Rom., during the thunderstorm of August 17, 2005.
16 Questions About Earth’s Atmsophere and Weather Answered
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?
Solar system illustration. (planets; sun)
Why Are Planets Round?
Remarkable new details of Pluto's largest moon Charon are revealed in this image from New Horizons' Long Range Reconnaissance Imager (LORRI), taken late on July 13, 2015 from a distance of 289,000 miles
Why Is Pluto No Longer a Planet?
Discover
Groups of depositors in front of the closed American Union Bank, New York City. April 26, 1932. Great Depression run on bank crowd
Causes of the Great Depression
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
pg 229Nazi parade features a banner proclaiming, "Death to Marxism."The possibility of a peaceful Germany after World War I was precluded entirely by the terms of the Versailles Treaty and theintransigent hostility of France and England. Stripped of indu
Were the Nazis Socialists?
Hemp (Cannabis sativa).
9 Mind-Altering Plants
Currency. Money. Cash. Dollars. Bills. Pile of ten, twenty, fifty, and hundred dollar bills.
6 Questions About the History of Money and Banking Answered
illustration of the walking titanosaurus, Patagotitan mayorum
Titanosaurs: 8 of the World's Biggest Dinosaurs
Cheetah (Acinonyx jubatus) standing on rock, side view, Masai Mara National Reserve, Kenya
The Fastest Animals on Earth

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Photos and Videos

rainbow
wind bending palm trees
rainbow
Understand the science of appearance of different colors of the rainbow
Know how rainbows are formed
Understand the science behind the formation of rainbows
See All Videos and Images →

Related Topics and References

Topics

Key People

Roger Bacon
Roger Bacon
English philosopher and scientist
Torbern Bergman, detail of an oil painting by Per Krafft; in the Royal Swedish Academy of Sciences, Stockholm
Torbern Olof Bergman
Swedish chemist and naturalist

Related Quizzes and Features

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
List
Lightning over the outskirts of Oradea, Rom., during the thunderstorm of August 17, 2005.
16 Questions About Earth’s Atmsophere and Weather Answered