An international team of researchers has developed a tiny, liquid-based engine powered by a demixing fluid. In their paper published in the journal Physical Review Letters, the group describes their little engine and possible uses for it.

Fabricated device and band structure. (A) Scanning electron microscope image of the device, which is composed of two regions identified by blue and yellow shading, corresponding to two photonic crystals with different topological properties. The interface between the two photonic crystals supports helical edge states with opposite circular polarization (s+ and s–). Grating couplers at each end of the device scatter light in the out-of-plane direction for collection. (B) Close-up image of the interface. Black dashed lines identify a single unit cell of each photonic crystal. Credit: Science…

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How to improve your memory in 4 minutes.

Damaged or chipped teeth can be reconstructed.

Traffic noise has many frequencies, making it hard to suppress. A new barrier with movable folds can change its acoustic properties in response to traffic patterns.

Nature’s designs are helping to build amazing new devices that link to the body and each other, reveals a fascinating book called Bioinspired Devices.

No-waste e-skin.

When an earthquake sets off a tsunami, it releases speedy sound waves that could give us early warning. But they still can’t predict the size of the tsunami.

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