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Camel at Khor Rori, Oman; mammal.

Do Camels Store Water in Their Humps?

Close up of periodic table, focus on nickel, copper, zinc, palladium, silver, cadmium

When Was the Periodic Table Invented?

Aphrodite. Greek mythology. Sculpture. Aphrodite is the Greek goddess of love and beauty.

12 Greek Gods and Goddesses

African Americans demonstrating for voting rights in front of the White House as police and others watch, March 12, 1965. One sign reads, "We demand the right to vote everywhere." Voting Rights Act, civil rights.

Timeline of the American Civil Rights Movement

Young boys working in a thread spinning mill in Macon, Georgia, 1909. Boys are so small they have to climb onto the spinning frame to reach and fix broken threads and put back empty bobbins. Child labor. Industrial revolution

The Rise of the Machines: Pros and Cons of the Industrial Revolution

Leonardo da Vinci (1452-1519), Italian Renaissance painter from Florence. Engraving by Cosomo Colombini (d. 1812) after a Leonardo self portrait. Ca. 1500.

10 Famous Artworks by Leonardo da Vinci

A mug shot taken by the regional Colombia control agency in Medellin

Pablo Escobar: 8 Interesting Facts About the King of Cocaine

placenta: Related Content

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Zika virus hijacks tunneling mechanism to infect placental cells • Feb. 23, 2025, 6:55 AM ET (News-Medical)

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chorion syndesmochorial placenta yolk-sac placenta placental barrier chorionic placenta chorioallantoic placenta deciduate placenta epitheliochorial placenta nondeciduate placenta afterbirth

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pregnancy: Diseases of the placenta