Interestingly, other early monuments in the locality - such as Rothiemay recumbent stone circle - have been supposed to align with astronomical events and, consequently, evidence of early horology.
http://canmore.rcahms.gov.uk/en/details/1114898/
http://canmore.rcahms.gov.uk/en/site/17820/digital_images/ro...
This is a later monument, but to my mind still an indication of "pre-historic science" - and just how advanced it could be.
As an aside, I was always pleasingly intrigued by the fact that Rothiemay was furthermore the birthplace of James Ferguson...