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Sunlight-powered generation of correlated photon pairs

Pairs of correlated or entangled photons are a foundational resource in quantum optics. They are most commonly produced through spontaneous parametric down-conversion (SPDC), a nonlinear optical process that typically relies on a stable, coherent laser to pump a nonlinear

Why Penguins Don’t Fly

We have a lot to learn about adaptability from a bird who evolved to swim The post Why Penguins Don’t Fly appeared first on Nautilus .

Genomic analysis predicts guide dog success

Guide dogs help thousands of people with visual disabilities navigate daily life. While guide dogs provide tremendous benefits, the current training program faces serious inefficiencies, since a large percentage never actually assist an owner. Only 60% of dogs evaluated for

Who shops at farmers markets in the US?

People who shop at the more than 8,700 farmers markets operating in the U.S. either year-round or seasonally generally fall into six distinct groups. Three of them are more interested in farmers markets than the others. I study local food systems as a strategic communications

NASA missions track record-breaking radio burst from sun

When NASA scientists first observed a particular radio burst from the sun in August 2025, there was nothing unusual about it. But then the radio burst kept going. Typically, solar radio bursts like these last a few hours to days. But this one was different. By the time it was

New species of venomous box jellyfish discovered in Singapore

Finding highly venomous box jellyfish that are almost invisible in water is not an easy task—but researching them is crucial so that we can learn how to safely avoid them. Stings from these "sea-wasps" are extremely painful and can be fatal. Knowing more about box jellyfish

Scientists discover vitamin B2 may help cancer cells survive

Scientists have uncovered a surprising dark side to vitamin B2: it may help cancer cells stay alive. The vitamin supports a cellular shield that protects tumors from ferroptosis, a form of programmed cell death linked to cancer suppression. In lab tests, researchers used a

Picturing Earth in a new light

Maps can show more than just where things are—they can also show how things change. New maps of artificial light reveal a planet that has been reshaping its nights through patterns of brightening and dimming.