The sun’s rays often feel good on your skin, but can cause serious damage.
Maksim Chernyshev/EyeEm via Getty Images
Our ancient ancestors didn’t have clothes or houses – but that constant exposure to the sun helped their skin protect itself from the worst sun damage.
UV light at most wavelengths can kill COVID–19.
andriano_cz/iStock via Getty Images
UV lights come in a variety of different wavelengths, but not all are equally effective at disinfection. Researchers tested a number of commercially available lights to find the best.
Harvard University/Dumbarton Oaks Museum. Photo courtesy Steensen Varming.
Museum lighting standards assume galleries are still using incandescent bulbs or fluorescent lights. But LEDs offer more for both audiences and conservation.
UV radiation can reflect off surfaces like sand or concrete, meaning shade doesn’t always prevent sunburn.
A light invisible to humans makes chemicals in our skin very excited. In fact, the chemicals become so excited they change shape and become vitamin D.
UVC radiation is effective for disinfecting objects and surfaces. It could help manage the coronavirus pandemic and fill gaps in PPE supplies.
Lighting causes damage to paintings over time.
Juan Di Nella/Unsplash
Researchers have found a way to reduce light damage to artworks by up to 47% by optimising LEDs to prevent light from being absorbed by the artwork.
Sunrise at noon in the Arctic. Little exposure to sun was a piece of the genetic puzzle.
Bering Land Bridge National Preserve
Why was one gene mutation that affects hair, teeth, sweat glands and breasts ubiquitous among ice age Arctic people? New research points to the advantage it provided for ancestors of Native Americans.
Fluorescent lights do emit UV, but not enough to harm human health.
The internet conspiracists are half right: most lights we have inside do emit UV, but not enough to harm us.
Government of Alberta/Flickr
Ultra-violet (UV) light can destroy a fungus that’s devastating the animals in North America.
Spend many months attached to the ISS and see how well you grow.
If you want to live on Mars, you’re going to need to grow food. Seeds are naturally equipped to handle challenging Earth environments, but how well can they survive what they’ll encounter off-planet?
Don’t skimp on the SPF.
Sabphoto via Shutterstock.com
Energy from the sun’s rays can cause skin damage and cancers. Sunscreens can absorb or reflect the dangerous UV light. Here’s how it works.
Achievement unlocked: Rewritable paper.
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.
New research from the University of Geneva is helping us understand how plants protect themselves from the sun.
A woman sunbathes on a warm summer day on a private beach in Nice, France.
The risks of UV radiation exposure are well-known, but some scientists are exploring lesser-known benefits of UV light.
The UV Index was created last century largely for North American and European conditions, which rarely reach the ‘extreme’ range.
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.
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.
The galaxies NGC 4038 and NGC 4039, locked in a destructive embrace.
After a slow start, Hubble’s ultraviolet vision changed the face of astronomy.
Throwing in the towel.
Despite the many awareness-raising campaigns on the harmful effects of ultraviolet (UV) radiation, a walk along any tourist beach will tell you just how many sun worshippers continue to soak up the sun…
The West African Gaboon viper’s pattern of cream, yellow, brown and black scales helps it blend in with leaves, but a new…