Light is something we use and need every day. It is a form of energy that allows us to see all around us! Lots of different sources produce light. Earth's main source of natural light is the Sun.

Anyone who wants to produce medication, plastics or fertilizer using conventional methods needs heat for chemical ...

Lanternfishes have light-producing organs on their bodies that are called photophores. This light is created by a chemical reaction, and it is one example of a phenomenon called bioluminescence.