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Britannica Explains

For Earth Day, put your money where your mouth is.

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A factory with smokestacks emitting green-patterned smoke. The text above reads, "What is greenwashing?" in bold black letters.

Why Earth Day?

What's the problem with an early spring?
What's the problem with an early spring?
Enrique Salmón explains the threat of biodiversity loss
Enrique Salmón explains the threat of biodiversity loss
Why are rainforests so important?
Why are rainforests so important?
The problem with climate change explained by Bill McKibben
The problem with climate change explained by Bill McKibben
The impact of human activities on climate change
The impact of human activities on climate change

Earth & Animals

The video thumbnail image shows a monarch butterfly perched on a plant with purple flowers.
How can we help protect monarch butterflies?
What are the different types of extinction?
What are the different types of extinction?
Is the tiger population declining?
Is the tiger population declining?
What is a trophic cascade?
What is a trophic cascade?
Will cloning bring the woolly mammoth back to life?
Will cloning bring the woolly mammoth back to life?

New on Britannica

Black-and-white photo of Teddy Roosevelt over Panama Canal backdrop, flanked by Panama and U.S. flags with “or” and a question mark between them.
How was the Panama Canal built—and who owns it?
A U.S. map outline contains a $20.00 imported label, overlaid on a background of grocery receipt text with an arrow pointing to the label.
What are tariffs and how do they work?
A dentist holds a glass of water while a child with an exaggerated smile reclines in a dental chair. The water glass is circled and blue arrows point to it.
Why do we add fluoride to our drinking water?
A pangolin walks through grass with a blue circle around it and the word "endangered" written in white across the image.
Meet the endangered pangolin
Close-up of a king cobra overlaid with question marks, a drawn crown, and an arrow pointing to the snake
How scientists discovered new species of the king cobra
Color illustration of Countee Cullen in profile, set against a purple background with white floral and map-like designs.
Countee Cullen's poem “Confession”: Reading and analysis
Collage showing a dog plus a saber-toothed cat equaling a prehistoric, quadrupedal creature with thick limbs and dark, hairless skin.
What came before the dinosaurs?
A hand holds a magnifying glass over an Absolut Vodka label, highlighting “80 PROOF” with question marks in the background.
Why is alcohol measured by proof?
An image of Joy Harjo, a Native American woman, imposed on a background of a notebook. A blue arrow points to Harjo with the label "poet laureate."
Joy Harjo explains the job of poet laureate
Sepia-toned map of Greenland, with the label "Greenland" highlighted in blue.
Who governs Greenland?
A bald eagle on a white column with a blue ribbon labeled "national bird," against a faded U.S. map background.
Why is the bald eagle the U.S. national bird?
A factory with smokestacks emitting green-patterned smoke. The text above reads, "What is greenwashing?" in bold black letters.
What is greenwashing?

Original Series

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Britannica Explains
Whatever your question, Britannica has the answer.
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Demystified
Science, art, history, and culture—demystified.
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B-Money Smart
Want to become a smarter investor, saver, and spender? Britannica Money breaks down the complex world of finance.
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Behind the Zodiac
What’s really written in the stars?
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Britannica Classics
Check out these retro videos from Encyclopedia Britannica’s archives.
A lilac British cat looking up. The cat opened his mouth with a mad look. The concept of an animal that is surprised or amazed.
#WTFact Videos
In #WTFact Britannica shares some of the most bizarre facts we can find.
Time running, deadline, life time or business milestone concept, closed up vintage pocket watch or clock on book in vintage tone
This Time in History
In these videos, find out what happened this month (or any month!) in history.

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