At Lake Tyrrell, southern Australia, the sky meets the Earth in a dazzling display. The state of Victoria"s largest salt lake was formed around 120,000 years ago. Over time, climate changes caused water levels to drop; these days, the lake is normally dry, except in winter when it"s covered in around 5 centimetres of water. The name "Tyrrell" comes from the local Wergaia word for "sky," a nod to the Boorong Aboriginal People"s interest in astronomy. Spanning more than 18,180 square kilometres, Lake Tyrrell is a haven for wildlife, including Mallee reptiles, kangaroos and emus.