Geography Of The World
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 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.
5 Most Snake-Filled Bodies Of Water In New York
Discover five New York lakes and wetlands where northern water snakes and garters concentrate along the shoreline, plus safety tips.
6 Most Snake-Filled Bodies Of Water In Connecticut
Connecticut's rivers, lakes, reservoirs, and forest ponds create ideal habitat for snakes, with six waterways standing out for their abundant populations.
The Lakes That Used to Be Part of the Ocean
Earth is constantly evolving through geological processes, both slow and catastrophic. Among those processes are evolutions of lakes which were once oceans.
How Many Cities Sit on the Shores of the Great Lakes?
Discover which major cities line the Great Lakes, from Chicago and Toronto to Duluth and Buffalo, across eight US states and Ontario.
Oldest Mountain Ranges Of The World
It takes a very long time to form a mountain. Small volcanoes can grow up in just a few months, but a big mountain typically takes thousands of years to take shape.
The Lakes That Sit on Fault Lines in the United States
Fault lines built some of America's most striking lakes. See how quakes and shifting crust shaped Tahoe, Reelfoot, and more.
The 10 Deepest Lakes in the World
The world's deepest lakes generally formed through ancient cataclysmic events, leading to deep rifts in the Earth which became filled with water.
How Long Would It Take to Drain Lake Superior?
Discover Lake Superior’s vast size, 191-year retention time, ecology, wildlife, islands, and importance to Great Lakes life.
Why the Great Salt Lake Keeps Shrinking
The Great Salt Lake's record low water levels in 2022, caused by reduced streamflow and evaporation, threaten Utah's economy, wildlife, and air quality.
The Shrinking Lakes of the American West Ranked
The West's shrinking lakes ranked, from Walker Lake's collapse to Owens Lake's dust, plus the Colorado reservoirs and rare recovery stories.
10 Largest Lake Islands In The World
Lake islands are islands that are situated within a lake. Some of the world’s largest lake islands are discussed in this article.
The Major Deserts Of The United States
Saguaro forests, gypsum dunes, and the hottest place on Earth. Discover the major deserts of the United States and the surprising variety within each
6 Most Snake-Filled Bodies Of Water In Arkansas
From Lake Ouachita to the White River, these are the 6 most snake-filled bodies of water in Arkansas, where cottonmouths and rattlesnakes share the water.
The Lakes Where Bass Grow Largest in the United States
The best bass lakes in America grow record largemouth through stocked trout, flooded timber, and Florida-strain genetics. Here are ten.
The Only Lakes in the World With Freshwater Sharks
Freshwater sharks live in only a handful of lakes worldwide. Discover the bull shark's rare tolerance and the nine lakes involved.
The 10 Longest Rivers in the United States
Combined, the Missouri and Mississippi would rank among the longest rivers on Earth. Discover the 10 longest rivers in the United States and where they flow.
The Lakes That Sit Inside Volcanoes
Volcanic lakes fill eruption craters or calderas, creating dramatic waters like Crater Lake, Toba, and Taal’s nested volcano lakes worldwide.
6 Most Snake-Filled Bodies Of Water In Utah
Utah is home to 28 different species of snake, including seven of which are venomous rattlesnakes, and many of these species thrive near major water bodies.
Why the Great Lakes Are Considered an Inland Sea
Why the Great Lakes are called an inland sea, from their ocean-sized waves and massive scale to their freshwater identity.
The Lakes Formed by Earthquakes in the United States
Explore six American lakes shaped by earthquakes, from Reelfoot to Quake Lake, where sinking land and landslides remade landscapes forever.
5 Most Snake-Filled Bodies Of Water In Indiana
Indiana’s lakes and rivers support diverse snake habitats, especially wetlands and shorelines, where watersnakes and queensnakes are commonly encountered.
How Many States Touch the Great Lakes?
Michigan touches four Great Lakes, while seven other states border Superior, Michigan, Erie, or Ontario along America’s northern freshwater coast.
How the Great Lakes Were Formed
Earth's largest freshwater system, the five Great Lakes, supplies 40 million people and took over a billion years to form.
The World's Longest Mountain Ranges
The world's longest mountain range hides almost entirely underwater. Discover Earth's longest ranges, from the mid-ocean ridge to the towering Andes.
6 Most Snake-Filled Bodies Of Water In South Carolina
Snakes are thriving in South Carolina’s waters, and the six bodies of water that follow are where the highest concentration of them lives.
5 Most Snake-Filled Bodies Of Water In Idaho
Rattlers swim, gopher snakes bluff, and garters fill the coves. These are the five most snake-filled bodies of water in Idaho and when to watch out.
10 Largest US Lakes
The U.S. has over 102,500 lakes, with Alaska leading in number, Minnesota in named lakes, and the Great Lakes spanning 94,250 square miles.
Tears Of The Turtle Is America's Deepest Limestone Cave
Nearly half a mile straight down, Montana's Tears of the Turtle is America's deepest limestone cave. Discover the record-breaking descent few will ever attempt.
10 Most Famous Rivers In The World
Rivers are the lifeblood of our world. This list looks at the ten most famous rivers in the world, from the Nile to the Mekong.