• A new class of cool blues

    Developers say they are also cheaper and safer.

    Cobalt Blue (CoAl2O4) is enduringly popular because, we are told, of its colour intensity, ease of synthesis and vers...

    Chemistry January 21, 2020
  • Very black is the new black

    Engineers get dark with carbon nanotubes.

    Engineers from the Massachusetts Institute of Technology, US, say they have created a material that is 10 times black...

    Physics September 15, 2019
  • One million colours

    A million pixels, each one of a different colour.

    A milion pixels, a million colours.Jan-Eric Nyström The image above, when viewed at full size, contains one m...

    Technology February 20, 2018
  • Gene mutation gives budgerigars their colours

    What makes a parakeet yellow is completely different to what makes a canary yellow.

    Why are budgerigars and other parrots so brightly coloured, with their hues of red to yellow? And why are there blue ...

    Biology October 5, 2017
  • Bees show way to improve camera colour accuracy

    Honeybees keep extra eyes on the sky to track colours.

    Is that dress blue and black or white and gold? How we perceive colour is complex, influenced greatly by lighting con...

    Biology July 4, 2017
  • Does a shifty lens help octopuses see colours?

    If they can’t see it, why the lavish use of colour?

    Octopuses, cuttlefish and squid, such as this Sepioteuthis lessoniana, can put on a colourful show, despite their eye...

    Biology July 10, 2016
  • Glowing corals deep in the sea

    Fluorescing corals 50 metres deep in the Red Sea uncovered.

    The dark depths of the Red Sea have been concealing an array of rainbow corals that put on a vibrant show under torch...

    Biology August 3, 2015
  • From the vault: In living colour

    Cosmos takes a look back at some of our most popular articles.

    Cosmos has some vibrant vault pieces to help colour you happy this week. Eye colour more complex than we thought Eye ...

    Biology July 6, 2015
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