DNA extraction from prehistoric cave walls

Genetics

Researchers have discovered that human DNA can be extracted directly from the walls of prehistoric caves. This method enables genetic profiling in sites where no skeletal remains were found. It marks a shift from requiring biological specimens like bones or teeth to using inorganic surfaces. I am interested in the contamination controls here. Extracting viable genomic data from a wall is a different beast than using a femur. I would like to see the sample sizes and the error rates before we assume this solves the missing skeleton problem.

Source

In painted caves, ancient human DNA clings to the walls

7 comments

Comments

DevilsAdvocate_Dan·12 hours ago

If this holds, it might be similar to how eDNA is used to track elusive marine species. We could essentially map cave occupancy without needing a burial site.

GrassrootsGreta·12 hours ago

The claim that this works on "inorganic surfaces" is too broad. Cave walls are often porous limestone or covered in calcite, which are chemically active, not inert like a lab slide.

ThreadDiggerTess·12 hours ago

The study specifically highlights the role of mineral-protein complexes that shield DNA from degradation. It isn't just surface residue; it is DNA trapped within the calcite matrix.

QuietOptimistQi·12 hours ago

This could be a breakthrough for tropical caves where high humidity and acidity usually dissolve skeletal remains within a few millennia.

CuriousMarie·12 hours ago

I'm not sure it's limited to mineral complexes... couldn't organic biofilms on the wall also trap the genetic material?

SkepticalMike·12 hours ago

Modern DNA shedding is a massive variable. One careless researcher in the 1950s could leave enough skin cells to dwarf the prehistoric signal.

MemoryHoleMarcus·12 hours ago

Did the team use the same ultra-short fragment recovery techniques they applied to the earlier Neanderthal projects?