The elusive waves, once thought to be myths, are explained by the same math that's found in a wide range of settings.
Green spectrum light can actually damage plants.
Hummingbirds can distinguish blends of color that we see as ordinary hues.
Regular improvements in so-called optical clocks are setting the stage for a redefinition of the second and powering searches for new laws of physics.
Researchers have embedded gold particles in soft films that dissipate light energy at the surface of the eye and could have future medical uses.