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You are here:  World Info » Science and Engineering
Four-stroke engines like this are more common in vehicles than the two-stroke engine. [©Shutterstock, 2010]

Science and Engineering » Engineering

How does a four-stroke differ from a two-stroke engine?

Learn about how a four-stroke differs from a two-stroke engine.

An ampere is a measure of electrical current. [©Shutterstock, 2010]

Science and Engineering » General Science and Technology

How did the electrical term "ampere" originate?

Learn about Andre Marie Ampere and his vital contributions to physics.

Vast pipelines like this deliver crude oil very long distances. [©Shutterstock, 2010]

Science and Engineering » Earth Sciences

Crude Oil

Learn how crude oil is made and how to invest in it.

The planets follow an elliptical orbit. [©Shutterstock, 2010]

Science and Engineering » Space Sciences

Is it true that Pluto is not always the outermost planet in the solar system?

Learn the outermost planet in the solar system.

A stretch of land like this would be many acres. [©Shutterstock, 2010]

Science and Engineering » Mathematics

How big is an acre?

Discover how big is an acre and learn about standard measurements.

Frankincense and myrrh are precious and potent forms of incense. [©Shutterstock, 2010]

Science and Engineering » Earth Sciences

From where do frankincense and myrrh originate?

Find out from where frankincense and myrrh originate.

The layout of a flower's petal can be described with Fibonacci numbers. [©Shutterstock, 2010]

Science and Engineering » Mathematics

What are Fibonacci numbers?

Read about Fibonacci numbers and when they were first developed.

Each ring in a cross-cut tree represents a year. [©Shutterstock, 2010]

Science and Engineering » Biological Sciences

How are tree rings used to date historical events?

Find out how tree rings are used to date historical events.

The Gypsy moth caterpillar is a pervasive and tree-damaging pest. [©Shutterstock, 2010]

Science and Engineering » Biological Sciences

Are there any natural predators of gypsy moth caterpillars?

Learn if there are any natural predators of gypsy moth caterpillars.

A meter is equal to 39.37 inches. [©Shutterstock, 2010]

Science and Engineering » Weights and Measures

How is the length of a meter presently determined?

Find out how the length of a meter is presently determined.

You are here:  World Info » Science and Engineering
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