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The 9 Longest Rivers in the World: From the Nile to the Congo
science.howstuffworks.com/environmental/earth/geophysics/9-longest-rivers-in-world.htm
When it comes to rivers, longest doesn't necessarily mean biggest, and length can be difficult to determine, so the top spot will always be debated.
How Infrared Grills Work
home.howstuffworks.com/infrared-grill.htm
Infrared grilling introduces less hot air and more radiating heat to food than traditional grills. But are they really better? Stronger? Faster?
What's a Subduction Zone? Everyone in the Pacific NW Should Know
science.howstuffworks.com/environmental/earth/geology/subduction-zone.htm
A subduction zone can shake things up — literally. These geological features are responsible for some of the most intense earthquakes, volcanic eruptions and tsunamis.
Polar Bear vs. Grizzly Bear: Which Bear Is Bigger and Tougher?
animals.howstuffworks.com/mammals/polar-bear-vs-grizzly-bear.htm
When it comes to massive, powerful bears, one showdown often comes to mind: polar bear vs. grizzly bear! These two bear species may look similar, but they have distinct differences in habitat, behavior and even diet. So, what happens when these giants of the animal kingdom cross paths?
There's a Rhino-shaped Cave in Washington State
science.howstuffworks.com/environmental/earth/geology/rhino-shaped-cave.htm
It's perhaps one of the strangest fossils ever discovered. We'll explain how it came to be 15 million years ago, and how hikers found it in the '30s.
Chipmunk vs. Squirrel Sizes, Habitats and Characteristics
animals.howstuffworks.com/mammals/chipmunk-vs-squirrel.htm
Pinning down chipmunk vs. squirrel identification is trickier than you might expect. The differences between the species largely come down to size and habitat.
How many bug species exist?
animals.howstuffworks.com/insects/how-many-bug-species-exist.htm
Wondering how many bug species are out there? Learn the difference between bugs and insects and find out many bug species exist.
Giganotosaurus vs. T. rex: Two Dinosaurs With Big Reputations
animals.howstuffworks.com/dinosaurs/giganotosaurus-vs-t-rex.htm
Dinosaurs ruled the Earth for over 160 million years, and two of the most talked-about giants are facing off in a battle of legends: Giganotosaurus vs. T rex.
Gray Fox vs. Coyote: Comparing Canids of the Wild
animals.howstuffworks.com/mammals/gray-fox-vs-coyote.htm
At a glance, the gray fox vs. coyote match-up might look lopsided. One is a medium-sized wild dog, the other a nimble omnivore that can climb trees.
The Porbeagle Shark Hunts With Dogged Determination
animals.howstuffworks.com/fish/sharks/porbeagle-shark.htm
Porbeagles are related to great whites, but while they're also athletic killers, they're smaller and far less ferocious. And what's with the funny dog name?