Tom Oder is a writer, editor, and communication expert who specializes in sustainability and the environment with a sweet spot for urban agriculture. There's a reason the intensely blue orchid flowers ...

"Until a few years ago, the butterfly pea flower was just another climbing plant in my village," says Nilam Brahma who lives in Anthaigwlao, a village in the northeastern Indian state of Assam.

Adrian Dyer receives funding from The Australian Research Council. At a dinner party, or in the schoolyard, the question of favourite colour frequently results in an answer of “blue”. Why is it that ...