Humans have long been fascinated by organisms that can produce light. Aristotle, who was a scientist as well as a philosopher, wrote the first detailed descriptions of what he called "cold light" more ...

When molecules interact with ultraviolet (UV) light, they can change shape quickly, producing strain—stress in a molecule's chemical structure due to an increase in the molecule's internal energy.

The mysterious interstellar object hurtling through our solar system has just given scientists more evidence that it may be a craft from another part of the galaxy. According to Harvard astrophysicist ...