To cut their wastes to nearly zero, circular cities are launching projects to repair, reuse and recycle virtually everything.

Kathryn Hulick is a freelance science journalist and author. Her book Welcome to the Future: Robot Friends, Fusion Energy, Pet Dinosaurs and More explores how technology could change the world in the ...

Some hydrogels are made of natural polymers. Jell-O is a good example. It contains a natural polymer called gelatin. Other ...

Dark matter isn’t the universe’s only “missing” matter. Distant bursts of radio waves have now turned up vast, faint gas ...

When water droplets take on an electric charge, rain can become corrosive and start to eat through bridges, cars and more, ...

This five-story-tall waterfall in Antarctica gets its blood-red color from the same reaction that creates rust.

California’s Death Valley is one of the driest, hottest and harshest places on Earth. In summer, thermometers there often climb above 49° Celsius (120.2° Fahrenheit). Such extreme heat can make it ...