American Medical Association

From Edison's carbon filament to the blue LED that unlocked white light — how we got from 1 lumen per watt to 150.

Why do we call some skilled work a profession and other work a trade? The medieval answer might surprise you.

A near-fatal gas explosion in Jerusalem raises hard questions about the safety of gas in our homes and apartments.

Are harsh streetlights ruining your sleep? Explore the science of why cities are switching to red and amber lighting for better health.