A 400,000-year-old fossilised human skull was found in the Aroeira cave in Torres Novas, Santarém, by an international team of archaeologists, led by João Zilhão.
The archaeologists spotted the skull in 2014 as they surveyed the extensive cave system. After years of careful work and analysis, the team has presented its findings in this week's issue of the US National Academy of Sciences’s newsletter.