Why is the past different from the future? Caltech physicist Sean Carroll explains how the arrow of time is not an intrinsic property of physics, but rather an emergent feature.

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Mood rings have been popular since the 1970s and can now be found everywhere from tourist shops, dollar stores and maybe even your local supermarket. But what makes the stone in a mood ring change colour? And does the colour actually relate to your mood?

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How do those Instant Hand and Toe Warmers Work?

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The electrons are what allow atoms to react with each other in chemical reactions, and they are also what cause certain compounds to emit light when heated.

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All scientists, including physicists, chemists and biologists, use thermodynamics in one way or another. So what's the basic concept? Thermodynamics is the study of converting energy from heat into usable energy (e.g. work).

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res-article 

A heated discussion about tempurature, kinetics, and the physics of energy.

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