What did the Britons use to transport the stones for Stonehenge

The theory is that individual bluestones were transported fromWales on wooden rollers and manpower. Transport partly by sea isalso another theory. Over the years, various trials and experimentshave been carried out – often using the manpower (and woman-power,of course) of the army to prove that any one theory is (or was)possible. In fact, no-one knows for certain! If time-travel ispossible in the distant future, maybe a definitive answer will befinally discovered!