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Solid-State Electrolytes Push Battery Safety and Density
Replacing a battery's liquid with a solid promises safer, longer-lasting cells.
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Perovskite-Silicon Tandems Set Solar Efficiency Records
Stacking two solar materials pushed efficiency past long-standing limits.
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Optical Computing Revives With Photonic Chips
Computing with light is returning as demand for AI hardware soars.
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Differential Privacy Puts a Number on Data Protection
A rigorous framework lets analysts share insights while provably protecting individuals.
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Federated Learning Trains Models Without Pooling Data
Models can learn from many devices without their data ever leaving home.
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Adversarial Examples Expose a Fragility in AI Vision
Tiny, invisible tweaks can fool image classifiers into gross errors.
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Grid Cells Reveal the Brain’s Inner Map
The brain contains a coordinate system for navigating space.
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Closed-Loop Brain Stimulation Eases Severe Depression
A brain implant that responds to a patient's own signals treated stubborn depression.
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Sleep Consolidates Memory Through Nightly Replay
The sleeping brain rehearses the day to make memories last.
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Regenerating a Limb: Lessons From the Axolotl
A salamander that regrows lost limbs is teaching biologists about regeneration.