be Late Neolithic monuments that resemble Stonehenge. The interpretation suggests a complex of numerous related monuments. Also included in the discovery is that the cursus track is terminated by two wide, extremely deep pits, whose purpose is still a mystery. An announcement in November 2020 stated that a plan to construct a four-lane tunnel for traffic below the site had been approved. This was intended to eliminate the section of the A303 that runs close to the circle. The plan had received opposition from a group of "archaeologists, environmentalists and modern-day druids" according to National Geographic but was supported by others who wanted to "restore the landscape to its original setting and improve the experience for visitors". Opponents of the plan were concerned that artifacts that are underground in the area would be lost or that excavation in the area could de-stabilize the stones, leading to their sinking, shifting or perhaps falling. In February 2021, archaeologists announced the discovery of "vast troves of Neolithic and Bronze Age artifacts" while conducting excavations for a proposed highway tunnel near Stonehenge. The find included Bronze Age graves, late neolithic pottery and C-shaped enclosure on the intended site of the Stonehenge road tunnel. Remains also contained a shale object in one of the graves, burnt flint in C-shaped enclosure and the final resting place of a baby. In January 2022, archaeologists announced the discovery of thousands of prehistoric pits during an electromagnetic induction field survey around Stonehenge. Based on the shape of the pits and the artifacts found inside, the study's lead author, Philippe De Smedt, assumed that six of the 9 large pits excavated were made by prehistoric humans. One of the oldest was about 10000 years old and contained hunting tools. Origin of sarsens and bluestones In July 2020, a study led by David Nash of the University of Brighton concluded that the large sarsen stones were "a direct chemical match" to those found at West Woods near Marlborough, Wiltshire, some 15 miles (25 km) north of Stonehenge. A core sample, originally extracted in 1958, had recently been returned. First the fifty-two sarsens were analysed using methods including x-ray fluorescence spectrometry to determine their chemical composition which revealed they were mostly similar. Then the core was destructively analysed and compared with stone samples from various locations in southern Britain. Fifty of the fifty-two megaliths were found to match sarsens in West Woods,