Humans Returned to Britain Earlier Than Thought

Why this is here: Fossil pollen and chironomids—non-biting midges—from Llangorse Lake helped scientists reveal Britain warmed roughly 500 years earlier than previously understood, with summer temperatures jumping from 5-7°C to 10-14°C around 15,200 years ago.

Researchers at Royal Holloway, University of London, determined humans returned to Britain around 15,200 years ago—nearly 500 years before previous estimates—following the last ice age. The team reevaluated radiocarbon dates from human remains and analyzed sediment cores from Llangorse Lake in Wales. They found summer temperatures in southern Britain rose sharply to between 10–14°C during this period.

Humans likely tracked migrating herds of reindeer and horses into newly habitable grasslands. Earlier studies struggled with imprecise dating and incomplete environmental records, leading to an underestimation of the warming trend. The researchers connected the animal migrations to human movement, suggesting even modest temperature increases spurred population shifts.

While the study clarifies the timeline of repopulation, questions remain about the exact conditions humans endured during this period of fluctuating climate. Understanding past responses to environmental change could inform projections for modern populations facing similar challenges as the planet warms.