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Adding lime to seawater could increase the efficiency of the world's oceans as carbon sinks. Learn about adding lime to seawater and carbon sinks.

Would you like to volunteer to help disabled veterans? Visit HowStuffWorks to learn how to volunteer to help disabled veterans.

These tree pictures will allow you to stroll through the world of walnuts, maples, redwoods and more. Check out these tree pictures at HowStuffWorks.

Sloths move slowly mostly because of their vegetarian diet. Learn why sloths move slowly and how their anatomy supports such lethargy.

Is it possible to make a nuclear-powered car? Learn more about the first nuclear powered car and how we can use nuclear power plant technology.

Many kinds of animals are native only to Africa. Check out these African animal pictures at HowStuffWorks.

Kangaroos hop with the help of powerful toes and springy tendons. Learn how kangaroos hop across terrain, and if they're physically able to walk.

Artificial life could exist as soon as 10 years from now, according to an Associated Press article published in 2007. Learn about artificial life.

Get answers to common salad questions. This article tells you how to create quick, healthy salads and salad dressings, and how to use fresh herbs.

A wrench is a hand tool used to turn a bolt head or nut. Learn about wrenches, and choose the right one based on the size and shape of the fastener.

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