The world's largest waterfall is in the ocean and is more than three times the height of Angel Falls, the largest waterfall on land.

This interactive website features nearly 40,000 photos from Wikipedia for you to create visual mosaics with.

As part of the up to 15 pounds of seafood they consume daily, sea otters eat urchins that feed on kelp forests—sources of shelter and food to over 800 species—thereby making the marine mammal a keystone species.

Semaglutides, which belong to a class of drugs called GLP-1s, are prescribed for weight loss in combination with diet and exercise because they trigger the release of the appetite-suppressing hormone incretin.

Here are some tips from Pew Research to help you distinguish between a good poll and an unreliable one.

A dog's nose can be up to 100,000 times more sensitive than a human's, and each possesses a secondary organ for smelling, which helps learn about other dogs when they sniff each other's butts.

Explore a detailed map of Odysseus' fictional journey from 'The Odyssey.'

Check out some of the best books that can be read in a single day, with titles from Han Kang, Denis Johnson, Muriel Spark, and more.

See a 3D reconstruction of Tenochtitlan, the Aztec capital

Lake Sørvágsvatn sits about 32 meters (105 feet) above sea level, but the taller surrounding cliffs create an optical illusion that makes it appear to float much higher above the ocean.

In 1962, the US detonated a nuclear weapon in space, which produced an electromagnetic pulse that disabled three low Earth orbit satellites and damaged electrical equipment in Hawaii.

Explore the wineries of Napa Valley with an interactive map of its hundreds of wineries, vineyards, and tasting rooms.

Give your memories a place to live and explore the personal stories left by strangers, tied to specific locations, in this interactive map of the world.

Sea stars are invertebrates—they lack a backbone—and while most exhibit pentametric radial symmetry due to having five arms radiating from a central disk, some can possess more than 40.

Researchers generally group gut bacteria into six different categories, with varying amounts of these microbes residing in different parts of the digestive tract.

Watch 4-plus decades of Pixar's opening logos.

Explore Lewis and Clark's 8,000-mile journey in Google Earth.

Watch President John F. Kennedy's speech on going to the moon

You may be better at spotting a lie when listening to a speaker's voice inflections rather than watching for facial and body cues.

Humans tend to imagine aliens as humanlike, but that's probably unlikely. Three different hypothetical planets show how aliens' bodies could take many forms.

Pregnancy makes someone more attractive to the mosquito species that transmits malaria.

Hear 50 years of iconic hip-hop samples, the genre's foundational looped tracks.

The Berlin Wall physically separated East and West Berlin for nearly three decades, preventing East Germans from fleeing to the West and earning the nickname 'the Iron Curtain.'

Watch what would happen if you literally had all the money in the world.

Experience 14 billion years of important moments in world history with this scrollable interactive timeline.

Relax to a livestream of brown bears chilling in Katmai National Park in Alaska.

Humans may have as many as 100,000 to 150,000 individual hairs on our scalps, growing at a rate of roughly 1 centimeter per month.

Watch Dr. Laurence Peter explain his 'Peter Principle,' which states that people are promoted to their level of incompetence and explains why bosses aren't always good at their jobs.

Joan Didion interviewed The Grateful Dead in 1967, before they became music icons.

Explore an interactive timeline of Earth's 4.5-billion-year history to visualize shifting landmasses and oceans, view the locations of significant asteroid impacts, and learn about major geological and biological events.

See a breakdown of how some of the most common food items are traded across the globe, including the key trade relationships for each item.

Light takes approximately eight minutes to travel from the sun's surface to Earth, but it takes thousands of years to reach the star's surface from its core—a distance more than 200 times shorter.

All rainbows are 'raincircles' caused by water droplets separating white sunlight into a spectrum of colors, but Earth's surface blocks the bottom half of the circle from our line of sight.

Play the role of a student as you try to navigate college and remain debt-free.

Explore 3D models of some of the most dangerous viruses, allowing us to understand these and other pathogens in new ways.

'Golden blood' is the rarest blood type in the world—fewer than 50 people are known to have it.

Explore an interactive forecast of the future of the universe, from the return of Halley's Comet to the last light in the cosmos.

Emanuel Leutze's painting 'Washington Crossing the Delaware' is one of the defining images of the Revolutionary War.

One of the most famous portraits ever taken is 'Afghan Girl' (1984) by Steve McCurry, yet the subject Sharbat Gula went much of her life without being identified or benefitting from the image's success.

One of the most famous portraits ever taken is "Afghan Girl" by Steve McCurry. Sharbat Gula, the subject of the photo, was not credited until 2002 for her role in the famous National Geographic cover, and continued to live in poverty after the photo was taken.

Visualize the path of every solar eclipse from 1900 to 2099 and see what each looks like when observed from different locations on Earth.