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How do fish rise and sink in the water?

animals.howstuffworks.com/animal-facts/question629.htm

How do fish rise and sink in the water? With a little help from gravity and buoyancy. Find out your answer to this question at HowStuffWorks.com

The Eyeless Olm Lives Underground and Underwater

animals.howstuffworks.com/amphibians/olm.htm

The olm is one of the strangest amphibians on Earth. This pale cave salamander lives in permanently dark habitats beneath the limestone landscapes of southeastern Europe.

How Do Dollar Stores Make Money?

money.howstuffworks.com/personal-finance/budgeting/dollar-store.htm

In good times and bad, dollar stores seem to thrive. But how are they are able to make so much money selling things so cheaply?

The Frog Quiz

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"It's not easy being green," a famous frog once told the world (in song, no less). But if you paid attention in science class, you shouldn't find this quiz too hard! Good luck!

How Often Do Whales Come Up for Air?

animals.howstuffworks.com/mammals/how-often-do-whales-come-up-for-air.htm

If you’ve ever watched whales surfacing with a dramatic blow from their blowholes, you’ve probably wondered: How often do whales come up for air?

The Wolf Eel Can Chomp on Sand Dollars and Sea Urchins

animals.howstuffworks.com/fish/wolf-eel.htm

With their serpentine bodies, massive jaws and slightly grumpy expressions, the wolf eel is one of the most misunderstood creatures beneath the waves.

Yes, Steak Tartare Is Safe to Eat

recipes.howstuffworks.com/food-science/steak-tartare.htm

It is raw beef, after all, so there's a natural tendency to shy away from eating steak tartare. But don't be afraid. You can eat it.

Mudskipper Robot Helps Show How Vertebrates Evolved to Walk on Land

science.howstuffworks.com/mudskipper-robot-vertebrate-locomotion.htm

A robot to simulate mudskipper locomotion gives scientists a look into the success of the first land vertebrate ancestors, and points to our future on other planets.

Can't Open That Childproof Bottle? Ask an Amazing Octopus

animals.howstuffworks.com/marine-life/cant-open-that-childproof-bottle-ask-an-amazing-octopus.htm

Octopuses are amazingly intelligent animals with nine brains. Learn more about octopus intelligence at HowStuffWorks Now.

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