20 results for “colour”
Matter, Energy & Physics
Light
colours of the rainbow are only a sliver of it. You are reading this because light
Article · 4 min read
Animals
The Octopus
colour-blind; how it chooses the right colours is still a mystery, and one theory is that
Article · 3 min read
Space & the Universe
Nebulae
colours. Point a telescope at the sword hanging from Orion's belt and the middle "star
Article · 3 min read
Plants & Fungi
Flowers and Pollination
colour, scent and shape evolved over millions of years to catch the attention of insects, birds
Article · 4 min read
The Human Body
The Senses
colour red, the sound of a voice, the smell of rain, is manufactured afterwards, in the brain
Article · 4 min read
Animals
Birds
colours we cannot and cross oceans without landing. Birds are everywhere people are, and almost everywhere
Article · 3 min read
The Human Body
Skin, Hair and Nails
Colour and sunlight Skin colour comes mainly from a pigment called melanin, made by cells at the base
Article · 3 min read
Matter, Energy & Physics
Atoms
colour. Those colours are the fingerprint of each element, and they are how astronomers know what
Article · 4 min read
Plants & Fungi
Carnivorous Plants
coloured and glazed with nectar to lure insects, and either slippery with wax or lined with
Article · 4 min read
Chemistry
Chemical Reactions
colour, bubbles of gas, a new smell, a solid appearing from a liquid, or a change
Article · 3 min read
Plants & Fungi
Photosynthesis: How Plants Eat Light
colour they do. Chlorophyll sits in stacks of membranes inside tiny structures called chloroplasts, hundreds of which
Article · 3 min read
Matter, Energy & Physics
The Quantum World
colours emitted by hydrogen by proposing that electrons can occupy only certain energy levels in an atom
Article · 4 min read
Planets & the Solar System
Jupiter
colour the clouds. Descend and the gas grows denser and hotter until, thousands of kilometres down
Article · 3 min read
Planet Earth
The Atmosphere
colours. As it passes through the air, molecules of nitrogen and oxygen scatter the shorter blue
Article · 4 min read
Planets & the Solar System
Mars
colour comes from rust. Iron minerals in the soil have oxidised over billions of years, coating
Article · 4 min read
Animals
Reptiles and Amphibians
colour changes and a tongue longer than its body, to the Komodo dragon, three metres long
Article · 3 min read
Chemistry
Acids and Bases
colour. Litmus paper turns red in acid and blue in alkali. Universal indicator shows a whole
Article · 3 min read
Space & the Universe
Exoplanets: Worlds Around Other Stars
colour of its light very slightly, blue then red then blue, and sensitive instruments can detect
Article · 3 min read
The Human Body
The Heart and Blood
coloured fluid called plasma that is mostly water carrying dissolved salts, sugars, proteins, hormones and waste
Article · 4 min read
The Human Body
Muscles
colour. Fast fibres contract hard and quickly but tire within seconds or minutes. Marathon runners' leg muscles
Article · 4 min read
