Seeing blue dots, red Xs, orange circles, and purple bands on trees and wondering what they mean? Here's what we found out ...

IN A world filled with concrete jungles and towering skyscrapers, a single tree on a street corner is a welcome breather to ...

In London, a copse of reconstituted trees is welcoming audiences to Ai Weiwei’s exhibition at the Royal Academy, where, eight years ago, David Hockney unveiled his 40ft painting Bigger Trees Near ...