Geography Of The World
The Longest Rivers in North America
From Montana's Rockies to Canada's Arctic, discover the longest rivers in North America and the vast watersheds that shaped a continent.
Largest Landlocked Countries In The World
From Kazakhstan's steppe to Chad's Sahara, discover the 9 largest landlocked countries in the world and the geography that cut them off from the ocean.
10 Largest Lakes In North America
There are 64 different noted lakes in North America. The following lakes are the top 10 largest lakes (by surface area) in North America.
Why The Great Lakes Are Called Inland Seas
Why The Great Lakes Are Called Inland Seas: at ocean scales, freshwater develops the waves, currents, stratification, and weather effects of a sea.
The Ocean Creatures That Can Live Without Sunlight
Sunlight diminishes quickly underwater, leading to perpetual darkness below 3,300 feet, where animals utilize unique methods to survive.
The Largest Glacial Lakes In The United States
Ice carved America’s largest glacial lakes into immense basins, leaving behind deep water, rugged shores, and a record of the last Ice Age.
The Largest Alpine Lakes In North America
The Largest Alpine Lakes In North America include Lake Tahoe, Yellowstone Lake, and Crater Lake, ranked by surface area high in the western mountains.
European Countries With The Most Forest Cover
Sweden has the most forest cover of any European country.
The Deepest Point In American Waters
The Deepest Point In American Waters is Sirena Deep, a hadal trench about 90 miles south of Guam that plunges roughly 35,151 feet below the Pacific.
How Many US Lakes Are Named Mud Lake?
How Many US Lakes Are Named Mud Lake? Over 900 in 33 states, with Michigan alone claiming 264, thanks to the shallow lakes left by Ice Age glaciers.
The Best Walleye Lakes In The United States
The Best Walleye Lakes In The United States include Lake Erie, Lake of the Woods, and Mille Lacs, prime waters for numbers and wall-hangers alike.
The Largest Lakes East Of The Mississippi River
The Largest Lakes East Of The Mississippi River include all five Great Lakes plus Okeechobee, Pontchartrain, Champlain, St. Clair, and Kentucky Lake.
The Sea Creatures That Glow To Lure Their Prey
The Sea Creatures That Glow To Lure Their Prey include the viperfish, anglerfish, and cookiecutter shark, each hunting by bioluminescent deception.
What Lies At The Bottom Of Lake Superior
What Lies At The Bottom Of Lake Superior, from the deepest known shipwreck and the doomed Edmund Fitzgerald to rare deepwater fish in perpetual dark.
How Many People Live In The Great Lakes Basin?
How Many People Live In The Great Lakes Basin? About 34 million residents across eight U.S. states and Ontario, from Detroit and Chicago to Duluth.
5 Most Snake-Filled Bodies Of Water In Nebraska
Discover Nebraska’s snake-filled rivers and reservoirs, from the Missouri and Platte to Calamus Reservoir and the Snake River, plus the species found there.
How Much Of The World's Freshwater Is In The Great Lakes?
How Much Of The World's Freshwater Is In The Great Lakes? Just over 24% of surface freshwater, and only Lake Baikal holds more than all five combined.
The Deepest Man-Made Lakes In The United States
The deepest man-made lakes in the United States, ranked by the maximum depth each reservoir reaches at full pool, led by Lake Oroville at 690 feet.
The Great Lakes Ranked By Water Clarity
The Great Lakes ranked by water clarity using average offshore Secchi depth, from clearest (Lake Huron) to least transparent (Lake Erie).
The Great Lakes Ranked By Summer Water Temperature
The Great Lakes Ranked By Summer Water Temperature, from shallow Lake Erie's bathtub-warm shallows to Lake Superior's cold, deep, open northern water.
The Lakes Most Threatened by Asian Carp Right Now
The lakes most threatened by Asian carp right now, including Kentucky Lake, Lake Barkley, Lake Erie, and Lake Texoma, plus how experts fight back.
10 Famous Landforms In The U.S.
There are not many countries in the world that contain the same amount of beautiful landforms as the U.S. does. Their beauty is unmatched and will leave you breathless!
Eastern European Countries
The 10 countries considered to be Eastern Europe were all once part of the eastern, communist bloc of countries led by the Soviet Union during the Cold War.
What Happens To Ships That Vanish At Sea
What happens when a ship disappears at sea? Explore the science behind vanished vessels, the real causes, and why the ocean sometimes keeps its secrets.
5 Most Snake-Filled Bodies Of Water In West Virginia
Though fatalities are extremely rare, it is best to understand these creatures' habitats and features so you can safely enjoy the beautiful riverside trails.
How Cold Is The Bottom Of The Ocean?
Most of the deep ocean floor stays between 32 and 39°F, even at the equator. A look at how cold the seafloor gets, and why it never warms up.
The US Reservoirs Closest To Dead Pool Status
A look at the US reservoirs closest to dead pool, from Lake Powell and Lake Mead to Elephant Butte, with the latest levels and what the risk means.
The Lakes Formed by Collapsed Caves
Ten lakes formed by cave collapses or openings, revealing massive underground caverns below, each with unique history or features.
The Lakes Formed by the Last Ice Age
Nine lakes across three continents, from Loch Ness to the Great Lakes, that glaciers carved during the last ice age and meltwater filled as the ice retreated.
The Caspian Sea Holds Three Times More Water Than the Great Lakes
The Caspian Sea holds over three times more water than all Great Lakes, but lakes provide essential freshwater for millions.
When Did The Last Major Volcanic Eruption In The US Happen?
The eruption of Mount St. Helens in 1980 was the last major volcanic eruption in the United States. Learn more about the 1980 eruption of Mount St. Helens.
The Most Polluted Lakes in the World
The eight most polluted lakes in the world, from radioactive Lake Karachay to microplastic-choked Lake Lugano and algae-plagued Lake Erie.
The Lakes Where Salmon Grow Largest Outside Alaska
See 10 lake systems in North America, Europe, and Patagonia that have produced Chinook and Atlantic salmon over 40 pounds.
The 10 Highest Mountains In The United States
The 10 Highest Mountains in the United States are all located in Alaska and are noted for their glacial settings and icy summits.
How Sea Lampreys Nearly Destroyed the Great Lakes
How did sea lampreys nearly destroy the Great Lakes? These parasitic invaders collapsed the lake trout fishery before a decades-long fight back.
How Quagga Mussels Are Outcompeting Zebra Mussels in the Great Lakes
How quagga mussels are outcompeting zebra mussels in the Great Lakes, from their deep-water edge to the ecosystem damage driving fish and algae problems.
How Are Canyons Formed?
A canyon is a deep cleft between escarpments or cliffs, often formed by rivers, weathering, erosion or tectonic activity.
The Biggest Lakes in British Columbia
Which is the biggest lake in British Columbia? Explore the province's largest, led by the 680-square-mile Williston Lake, and the rivers that feed them.
How Grass Carp Threaten the Great Lakes Wetlands
Learn how invasive species threaten ecosystems and why grass carp have become a major concern after their introduction to non-native waters.
Which Country Has the Most Fresh Water?
Brazil, Russia, and the United States are home to the top three largest amounts of renewable fresh water.