Mr McCallum joined the Australian Defence Force in the late 1980s, which he said gave him the passion for “experiential learning”. He said his career change stemmed from his experience on Mt Everest ...

In mid-19th-century Ibadan, military expeditions under Balogun Ibikunle were so successful in slave-catching that by 1859, the city was gripped in the apprehension that it had harvested more slaves ...

After seeing deaths on the world’s highest mountain, including that of an eight-year-old girl, an ADF member traded his career for a mission to inspire the next generation of explorers. Mr McCallum ...