Even the balmy tropics may have once been crushed by colossal masses of ice.

These giant rocks could roll at any moment. The fact they haven't offers a window into the shaking of ancient Earth.

These giant rocks could roll at any moment. The fact they haven't offers a window into the shaking of ancient Earth.

Discover the top landmarks in Australia, from the iconic Sydney Opera House and Uluru to hidden gems that will leave you ...