THE dark green circles of grass known as “fairy rings” formed the subject of a paper in the Philosophical Transactions of the new-born Royal Society in 1675; but it was only last year that the ...

Nature Photonics spoke to Yoriko Ando from the ... producing a distinctive yellow-green emission. A substance called luciferin is oxidized using the catalyst enzyme luciferase, magnesium ions ...

Violet by name, violet by nature, the genus Viola is a perfect example of purple in the natural world. Purple is common in plants, largely thanks to a group of chemicals called anthocyanins. When it ...