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5 Hugely Fun Facts About Mass (Not Weight)
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Weight is the measurement of gravity's pull on an object. And it varies by location. Mass is a different beast altogether.
5 Ideas for Experiments on Conserving Energy
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About 70 percent of our energy comes from non-renewable sources like oil and natural gas. When they're gone, they're gone for good. Learn some simple ways to conserve energy through these five simple experiments.
5 Improvements in Offshore Oil Drilling
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The explosion and fire that destroyed the Deepwater Horizon drilling rig in the Gulf of Mexico in April 2010 killed 11 crew members and triggered an environmental nightmare.
5 Innovative Social Devices
science.howstuffworks.com/innovation/inventions/5-innovative-social-devices.htm
Smartphones, tablets and other devices are not just useful; they can improve your social life. We'll look at some of the newest ways to integrate social media into whatever you're doing.
5 Invasive Species That Might Conquer the World
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Invasive species are found around the globe, and can be damaging to the world's ecosystems. Some invasive species seem almost unstoppable like these five.
5 Most Coveted Offshore Petroleum Reserves
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Untapped petroleum reserves dot the globe. Find out where these untapped petroleum reserves still exist and why oil companies covet them heavily.
5 Reasons Commercial Airplanes Crash
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Although it doesn't happen often, large passenger jets crash for many reasons, from mechanical failure to pilot error.
5 Reasons Parasites Are Beneficial to Earth
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You probably think all parasites are disgusting little critters, but that's not always the case. Several are actually critical to the planet.
5 Secrets About the Soviet Space Program
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The Soviets were secretive about their space program. We're telling five of the biggest now.
5 Surprising Facts About Gun Silencers
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For instance, gun silencers don't make guns all that quiet.