Deep Underwater Caves Hold the Clues to Australia's Lost Giants!

Divers have explored dark, watery caves in Australia and found the ancient bones of extinct megafauna [huge animals from long ago]. By studying how algae and bacteria left marks on these bones, we can finally solve the mystery of how these massive creatures ended up deep underground. Imagine swimming through a shadowy cave and shining your flashlight onto the skeleton of a giant, ancient beast!