Thrombolites are amazing structures. Along with their close relatives stromatolites, these ancient bacterial colonies are ancestors of the very first life forms to exist on earth, and the hard calcareous deposits created by these colonies are bizarre. It’s actually quite humbling to stand alongside these living relics. These thrombolites are on the….

We’d been in Australia for a fortnight. While we’d seen some amazing wildlife, including kangaroos, dolphins and some amazing bird life, the closest we’d come to seeing a koala was the cuddly toys at the local souvenir shop. That’s hardly surprising — because its an east coast species that doesn’t occur in Western….