Articles sur UV light

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Achievement unlocked: Rewritable paper. Yadong Yin

Reprintable paper becomes a reality

Coating paper with an inexpensive thin film can allow users to print and erase a physical page as many as 80 times. That reduces both the cost and the environmental effects of paper use.
The UV Index was created last century largely for North American and European conditions, which rarely reach the ‘extreme’ range. Andy Cross/Flickr

Health Check: what does the UV Index mean?

Alongside the day's high and low, weather reports generally contain a UV alert for a particular time. But what does it actually mean – and what should you do about it?
International Agency for Research on Cancer has classified UV-emitting tanning devices as a Group I carcinogen – the most dangerous cancer-causing substances. Tanning bed via www.shutterstock.com.

Think indoor tanning is a safer alternative to sitting in the sun? Think again

Researchers have estimated that 8% of the five million cases of skin cancer diagnosed each year in the US can be attributed to indoor tanning.
This is bad, but it would be a lot worse without the ozone layer. garth.kennedy/Flickr

How does the ozone layer protect Earth from radiation?

SAVING THE OZONE: Part three in our series exploring on the Montreal Protocol on Substances that Deplete the Ozone Layer – dubbed “the world’s most successful environmental agreement” – explains why we…
Cotton coated with the superhydrophobic material repels a drop of water. Deakin University

Keeping clean easier with water-repellent coating

A new coating for cotton that is 1½ times more water-repellent than Teflon can survive for dozens of machine washes, say…

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