As per The Conversation, the sun will get brighter as it ages, which might turn our waters purple. Evidently, however, the ...

one for green. It gave them an edge in the evolving color of ancient seas. If we spotted a pale-green ocean from space, it might mean early photosynthesis is underway. A visual clue to alien life.

Bright green is actually good camouflage in the honeycreeper's native Amazon rainforest, but the purple of the male is all for show. The bird world is full of vivid male colours. Females often rely on ...