Australia is full of weird plants and animals. And Dr Ann Jones is on speaking terms with most of them! Each week Ann explores the most unusual elements of our natural world — the ones that make you go What the Duck?! Like why do quolls have spots? Who farts (and who doesn't)? And how do snakes...

The Off Track adventure has come to an end.

The song calls of Antarctic blue whales are so deep that they're almost infrasonic - you feel them as much as you hear them.