The ocean floor off Australia's east coast bears the scars of numerous subsea landslides, which have potentially triggered tsunamis over the past several millennia.
Australia was a different place 275 million years ago - wild storms surged through icy seas, and marine animals lived a tenuous existence. But brittle stars had a survival strategy.
Surveying the bottom of the ocean turns out to be far from easy. But there was something wonderful about seeing animals we have only read about in old books.
Marine sediments provide evidence of climate variability in South Africa going back 270,000 years. These changes correspond with changes in the archaeological record of the country.