A new laser with a linewidth of just 10 mHz has established a new world record for sharpest laser. Theoretically, a laser (a device which emits light through optical amplification) has a fixed color, frequency or wavelength.
We know right where the danger zones are, and we keep building right on top of them. More people are at risk of natural disasters than ever before -- and much of it is our own fault for continuing to build where nature says not to.
Researchers at Columbia and McGill have discovered different types of memories storied in the same neuron in snails can be selectively erased. The implications for human memory are huge.