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composite or energy sources

Storage solution

Stanford researcher suggests storing solar energy underground for a cloudy day.

Stone tools

Cultural explosions

Stanford biologists trace how human innovation affects tool evolution.

Leo Yu and Carsten Langrock

Quantum leap

Stanford physicists set quantum record by using photons to carry messages from electrons 1.2 miles apart.

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"Your brain grows when you make a mistake." Prof. @joboaler advocates visual, open-ended math instruction:
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