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Science

Hearts and stars in fireworks: How do they do that?
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Hearts and stars in fireworks: How do they do that?

Fireworks are so advanced they turn into all kinds of shapes — even smiley faces. But have you ever wondered how they're done? 

Undersea waves may melt Arctic ice
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Undersea waves may melt Arctic ice

Only the biggest waves can stir up warm water in ocean depths.

Researchers train dog detectives so their results are admissible in courts
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Sniffing out criminals: Researchers train dog detectives so their evidence is admissible in courts

"They smell in colors," said Cindy Otto, director of the Pennvet Working Dog Center in Philadelphia, and a member of search and rescue teams. "They use their nose as we use our eyes," she said.

The physics of sliding on ice
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The physics of sliding on ice

A new mathematical model could answer puzzling questions about frozen water.

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Inside the spaceflight of 'The Martian'

A look at the real-life science of the spacecraft and mission in the book and movie.