Uniquely preserved artillery offers clues of European colonisation
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Updates every hour. Last Updated: 1-Sep-2025 17:11 ET (1-Sep-2025 21:11 GMT/UTC)
In southwestern Kenya more than 2.6 million years ago, ancient humans wielded an array of stone tools—known collectively as the Oldowan toolkit—to pound plant material and carve up large prey such as hippopotamuses. These durable and versatile tools were crafted from special stone materials collected up to eight miles away, according to new research led by scientists at the Smithsonian’s National Museum of Natural History, Cleveland Museum of Natural History and Queens College. Their findings, published Aug. 15 in the journal Science Advances, push back the earliest known evidence of ancient humans transporting resources over long distances by some 600,000 years.
Much previous work in the social sciences has involved researchers – often but not always from the Global North – collecting data from rural communities in the Global South on a wide range of topics from public health to education, agriculture and climate change. Such ‘helicopter’ research is not good practice as it often involves an asymmetry of power and knowledge that invariably disadvantages local communities. So how can research be made more equitable? This is the topic of an analysis undertaken by Jasper Knight from the Wits School of Geography, Archaeology and Environmental Studies, who is also chair of the University’s Non-Medical Ethics Committee, in a new research study published in the International Journal of Qualitative Methods.
In a new study, archaeologists analyzed iron artifacts spanning more than 400 years of American colonial history using X-ray fluorescence spectroscopy. Their results show that differences in the purity of iron and the trace elements it contains can be reliably used as a diagnostic feature to identify iron artifacts from different time periods.