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On D-Day, June 6, 1944, a force led by General Dwight D. Eisenhower launched the greatest amphibious invasion of all time against German defenses on the coast of Normandy, France.

Cambodia incursion into Vietnam and reaction in the United States. www.britannica.com

Testing rainwater and air for acidity at a research station in the Black Forest, Germany.

North American River Otters (Britannica.com)

A mongoose (genus Herpestes) attacking an Indian cobra.

Lions (Panthera leo) engage in various activities such as hunting, eating, grooming, and sleeping.

If all of your friends jumped off the Brooklyn Bridge, would you? If you happen to be a lemming, unfortunately, the answer is a resounding "YES."

The Land Iguana of the Galapagos Islands (Britannica.com)

The Courtship of Anna's Hummingbird (Britannica.com)

The unique architecture of the hummingbird's wings allow it to hover over flowers in mid-flight. Iridescent feathers on the head and throat display a variety of brilliant colors.

African elephants (Loxodonta africana) filmed in their natural habitat.

Can you name the 5 food groups? Poor Ralph can't... Luckily, he had Encyclopaedia Britannica Films to show him the path towards proper nutrituion to put more "pep in his step!"

Volcanoes: Formation of Surtsey

DNA is extracted, treated with restriction enzymes, and sequenced using gel electrophoresis to create a genetic fingerprint.

African Chameleon Preying on Insects (Britannica.com)

Bald Eagles in Southern Alaska (Britannica.com)

A day in the life of anubis, or olive, baboons (Papio anubis), filmed in the Ngorongoro Conservation Area, Tanzania. Awakening among the boughs they slept in, the troop roves, feeds, and cares for its young before again retreating to safety of the treetop.

"In this troubled stage of the atomic age, our very lives may depend on always being alert."

Argentina: Wildlife: Elephant Seals and Penguins.

The cathedral in Aachen, Germany, and the throne of Charlemagne.

The Amazon rainforest is home to a bewildering array of wildlife, including macaws, toucans, tyrant flycatchers, capybaras, tapir, sloths, squirrel monkeys, red howler monkeys, jaguars, caimans, anacondas, tarantulas, leaf-cutter ants and scarlet ibis.