Although the chemistry of autumn colours is well understood, there is an ongoing and lively debate among scientists about why trees evolved their vivid autumn colours in the first place. Driving north ...

We put the natural world under a microscope and answer some curly questions about meteors, rogue waves and more.See all 21 stories. Take the scenic route north-west out of Hobart into Tasmania’s Mount ...

When you think of autumn what comes to mind? For lots of people, it's the leaves turning brown. But have you ever wondered why some trees' leaves change colour around this time of year? Trees called ...