News tagged with light

How scientists invent new colours

For tens of thousands of years, humans have created colours through simple chemistry. At first we used dyes found in nature such as berries and charcoal. Later, new pigments were synthesised in the lab.

dateJul 21, 2017 in Materials Science
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Why we need a new type of SETI instrument

Imagine this scenario: On a world orbiting a neighboring star, a society more advanced than our own has used large telescopes to survey all the planets within a few hundred light-years.  In this sample of a million worlds, ...

dateJul 18, 2017 in Astronomy
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