Archaeologists Baffled By A 2,000-Year-Old Skeleton Found In Scotland With Its Brain Scooped Out And Its Bones Turned Into Tools

The cool, consistent temperatures of the far north also contribute to preservation.

Warmer soils support more active bacterial and fungal communities, which are the primary biological agents of organic decomposition.

In cooler soils, these communities are less active and decomposition proceeds more slowly, giving stable minerals like bone calcium phosphate more time to resist dissolution.

The specific combination of these conditions at the Loch Borralie site is what made the discovery possible — not just the fact that the cairn existed, but the fact that the bones within it survived in a form that could be analyzed.

Across most of lowland Britain, the equivalent remains would have been completely dissolved or reduced to uninterpretable fragments within a few centuries of burial.