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Saharan Dust: The Good, the Bad and the Gritty

science.howstuffworks.com/life/cellular-microscopic/saharan-dust-good-bad-and-gritty.htm

Dust from the Sahara makes its way around the world with both positive and not-so-positive consequences.

What's the Difference Between a Dugong and a Manatee?

animals.howstuffworks.com/mammals/dugong.htm

Their mamas may be the only ones who can tell them apart, but there are major differences between these cousins, one being the type of water in which they can survive.

What's the Difference Between a Tortoise and a Turtle?

animals.howstuffworks.com/reptiles/tortoise-turtle-difference.htm

Tortoises and turtles both have prehistoric looking shells and look very much alike, but what's the difference?

Find the Best Weather in the U.S. in These 8 Cities

science.howstuffworks.com/nature/climate-weather/meteorologists/best-weather-in-the-us.htm

Some places seem to have it all: sunny skies, warm temperatures, low humidity and no need to shovel snow.

What's the Difference Between Manta Rays and Stingrays?

animals.howstuffworks.com/marine-life/difference-between-manta-rays-stingrays.htm

These two sea creatures can be easy to confuse. But they're actually quite different. We talked to experts to find out how to tell them apart.

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.

The Conch Is an Endangered Sea Snail That Needs Your Help

animals.howstuffworks.com/endangered-species/conch.htm

Before collecting that conch shell, learn how over-harvesting for meat and souvenirs has endangered conch populations and what you can do to help their survival.

Why do people collect shark teeth?

animals.howstuffworks.com/fish/sharks/shark-teeth.htm

Collecting shark teeth is a hobby for many people, but why do we do it? Learn why collecting shark teeth is like gathering up pieces of history.

Chicxulub Crater: Where the End of the Dinosaurs Began

science.howstuffworks.com/environmental/earth/geology/chicxulub-meteor.htm

The Chicxulub meteor impact may have killed off the dinosaurs. Would they have lived if the meteor missed? Learn more about the Chicxulub meteor.

Which of today's animals lived alongside dinosaurs?

science.howstuffworks.com/environmental/earth/geology/dinosaur-contemporary.htm

Which of today's animals lived alongside dinosaurs? Some animals' ancestors lived with dinosaurs. Learn which current animals lived alongside dinosaurs.

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