• The
Post Track, an ancient
causeway in the
Somerset Levels, England, is built, c. 3838 BC. It is one of the oldest engineered
roads discovered in
Northern Europe. • The
Sweet Track, an ancient causeway also in the Somerset Levels, the oldest
timber trackway discovered in Northern Europe, is built in 3807 BC or 3806 BC;
tree-ring dating (dendrochronology) enabled very precise dating. •
Plough in use. ==References==