Female glow-worms attract males with a chemical reaction in their abdomen. Wirestock Creators/Shutterstock The invention of electric light has extended our lives deeper into the night: street lamps ...

America's rapid adoption of LED lighting saves money and uses less electricity. But it's also making it harder to see the stars. Light pollution comes from excessive artificial light that causes the ...

It’s not just about seeing the stars. Bright city lights disorient animals like birds, leading to fatal collisions and potential long-term damage to their health. The city lights of La Paz, Bolivia ...

Humans are naturally afraid of the dark. We sometimes imagine monsters under the bed and walk faster down unlit streets at night. To conquer our fears, we may leave a night light on to scare away the ...