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materials

magnifying glass

Technology

Coated paper holds secret messages that can be erased with a hairdryer

When paper with a special manganese-based coating is printed with water, the message is only visible in UV light – and it can be erased with a hairdryer

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A hat that zaps the scalp with electricity helps reverse male balding

Health

A hat that zaps the scalp with electricity helps reverse male balding

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The Urbach Tower

Technology

Tall twisting tower is made from wood that shapes itself as it dries

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Man with tent at night

Technology

Generator that runs on heat escaping to the sky can charge phones

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a cross section of the modified wood

Physics

A super-thin slice of wood can be used to turn saltwater drinkable

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Terraforming Mars with strange silica blanket could let plants thrive

Space

Terraforming Mars with strange silica blanket could let plants thrive

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An artificial limb is driven by two fiber-based muscles actuated via a heat gun.

Technology

Superstrong artificial muscle can lift 1000 times its own weight

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Armoured droplets

Technology

Armoured liquid droplets make mini disco balls, letters and shapes

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Bread

Environment

Packaging-free shops may tackle plastic but risk increasing food waste

Insight

self-unfolding device

Technology

A solar panel that unfolds in sunlight could power spacecraft

Special polymers that expand when heated allow a solar panel to unfurl when it is exposed to sunlight, which could be useful for solar-powered spacecraft

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Technology

Shatterproof phone screens could be made from seashell-like glass

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People in Science

Marie Paulze Lavoisier

Definition

Second law of thermodynamics

Health

Oozing white mucus from giant salamanders makes excellent medical glue

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