Technology had enabled humans to explore the deep sea, the Earth's poles, and outer space. But we shouldn't forget historical lessons about frontiers in the process of traversing them.
Musk's know-how cannot be dismissed but there are significant challenges standing between him and his dream of colonising Mars.
Australia's national legitimacy is compromised by the failure to repair its relationship with its Indigenous population. Our series explores different ways of resolving this unfinished business.
The First Fleet had three layovers on its voyage to Australia – one was Rio de Janeiro. As Australia and Brazil celebrate 70 years of diplomatic relations, it's worth remembering this encounter.
Why are the UK's left-over possessions in the Indian Ocean still the subject of furious legal dispute?
The company built by 'Cattle King' Sidney Kidman is for sale. He enjoyed good relations with the Indigenous inhabitants, but proper recognition of their rights to their land seems ever more elusive.