Jim AlKhalili demonstrates how AlKindi developed frequency analysis to study encrypted messages in the first century AD.
Marcus du Sautoy illustrates Georg Cantor theory of infinite infinities, and that some infinities are bigger than others.
National Rifle Association president Charlton Heston speaks at the organisation's convention in Denver, near Columbine, shortly after the massacre and is met my protesters.
Geomorphologist Grant Pearce takes Emma Johnston scuba diving in Piccaninnie Ponds and Kilsbys Sinkhole on South Australia's Limestone Coast.
When computer gaming was first introduced, it flopped. It was all too complicated. One man realised that keeping it simple was the key to hitting the big time.
Karl Stefanovic explains how the Great Barrier Reef is a product of the Ice Age coming to an end and raising water levels 10,000 years ago.
This series profiles Australia's leaders, featuring career highlights and giving insights into the different eras in which they lead the nation. This episode features Bob Hawke.
Neil Oliver examines torcs and coins and argues that they represent the growing power of kings and transferable symbols of the state.
This short clip explains the natural and man made causes of global warming. It includes an explanation of the Greenhouse Effect
This clip describes the features of the Great Wall of China and details how and why it was built.
Naturally Australia describes some of the risks to the survival of the Great Barrier Reef, including river runoff and crown of thorns starfish, and the circumstances in which some damage is healthy.
Explores the conflict and struggle between Jacquie Lambie and her son after he became addicted to ice.
This series profiles Australia's leaders, featuring career highlights and giving insights into the different eras in which they lead the nation. This episode features William McMahon.
Jimmy Doherty visits a chocolate factory to learn how cacao beans are transformed into chocolate and what the difference is between white and dark chocolate.
Joseph Banks suggests that Botany Bay become a penal colony. The British decide they can claim it as their own despite the existence of Aboriginal people.
Neil Oliver visits Demark's Hjortspring boat (c 350 BC) and explains how the Vikings evolved from warring Scandinavian tribes.
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