Scientists are getting closer to proving a Turkish site discovered in the 1990s is the Biblical Noah’s ark, with soil samples consistent with the presence of rotting wood, The Sun reported Sunday.

Dr. Memet Salih Bayraktutan, a Turkish geologist, collected 22 samples from inside and just outside the possible structure last year.

An analysis at Ataturk University showed that the soil from inside had a lower pH, more potassium and a higher percentage of organic matter than the outside.