National Museum of Natural History

Two-toed sloths (Choloepus hoffmanni) live in the canopy layer of the Panamanian rainforest. Find out why in a family program streaming July 17. (Smithsonian Tropical Research Institute, Punta Culebra Nature Center)

Five Free Natural History Programs Streaming in July

Stream these free programs and more this July through the Smithsonian’s National Museum of Natural History

Head scientist at the Smithsonian Marine Station, Valerie Paul, collects blue-green algae samples to study the chemicals they emit. Those chemicals can endanger coral reefs, but also have biomedical potential. (Raphael Ritson-Williams)

Meet the Marine Scientist Studying How Algae Communicates

Valerie Paul's work adds to scientists’ knowledge about the ways marine biochemicals can potentially help restore coral reefs and create new biomedicine.

A giant replica of the Aedes mosquito, a known vector for the disease yellow fever, has been waiting for visitors to return the National Museum of Natural History’s “Outbreak: Epidemics in a Connected World” exhibit. (James Di Loreto, Smithsonian)

Don’t Miss These Objects When the Smithsonian's Natural History Museum Reopens

Whether you're a seasoned visitor or a newbie to the natural history museum, there are plenty of things for you to explore.

While this year’s Arctic sea ice extended further than last year’s, there still wasn’t as much of it as there was only two decades ago. Thinner and younger sea ice in winter and less ice in the summer are two of the many elements of the Arctic’s new reality. (Credit: Patrick Kelley, U.S. Coast Guard. Public domain.)

Climate Change Redefines What 'Normal' Means in the Arctic

As Earth’s climate changes, people around the world are witnessing insidious changes and responding to their new normal.

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