Editor’s letter

& WHERE TO FIND THEM

Predicting the future is considered a fool’s game. But it’s one many of us like to play. And seeing as we asked a selection of experts about the biggest breakthroughs of the century so far (p38), we c

Many birds have fabulous plumage to attract mates or send warning messages. Some of the colours in their feathers are produced by microscopic structures on the feather surface that absorb and reflect