1. Sacred hunting ground
The area around Stonehenge was a hunting ground along an ancient auroch migration route thousands of years before the first stones were raised, according to archaeological evidence. A site just a mile (1.6 kilometers) away from the Wiltshire, England-megaliths contains evidence of human occupation spanning 3,000 years, including thousands of auroch bones, flint tools and evidence of burning. The Stonehenge site itself bears evidence of construction as far back as 8,500 to 10,000 years ago, when a few pine posts were raised to create an ancient structure. This archaeological evidence hints that the site was originally an ancient hunting and feasting site, and perhaps the megaliths were raised to memorialize the meaty bounty.
2. Unity monument?
Stonehenge's construction may have been about more than primeval barbecue cookouts. Some believe the British megaliths were erected to celebrate peace and unity. During the monument's period of intense building, between 3000 B.C. and 2500 B.C., the culture of the British isle was increasingly unified, a fact exemplified by more uniform pottery styles taking hold throughout the region. The massive endeavor would have taken thousands of laborers and employed stones from far-flung Wales. Working on such a big collaborative project would have been a unifying exercise on its own.
3. Astronomical calendar
Many believe the ancients celebrated winter solstice at Stonehenge. The avenue near Stonehenge is aligned with the winter solstice sunset, and nearby archaeological evidence suggests that pigs were slaughtered during December and January — possibly for a mid-winter feast. The site also faces the sunrise during the summer solstice, and thousands of visitors still flock to the site every year to celebrate at that time. [Gallery: Stunning Summer Solstice Photos]
4. Stonehenge sound illusion
Two pipers playing in a field around Stonehenge would have the sounds canceled out at certain spots, a sound illusion that may have inspired Stonehenge builders, according to a presentation given at the 2012 American Association for the Advancement of Sciences meeting. The megaliths might have been raised to augment the area's natural sound cancellation, with the boulders selectively blocking sound. In fact, the monument is often nicknamed "The Piper's Stones" in England, and legend holds that magic pipers led maidens to the field, and then turned them into the stones present today. Even those who don't buy the sound illusion theory don't deny that Stonehenge had amazing acoustics, with the cavernous echoes typically found in a lecture hall or a cathedral.
5. Elite cemetery
The mysterious monument may have once been a burial ground for the elite, according to one study. Thousands of skeletal fragments from at least 63 individuals have been exhumed from the area, with an equal proportion of men, women and children found there. The burials date to 3000 B.C., as construction of the monument was getting started. Archaeologists have also unearthed a possible incense bowl and a mace head, an object usually associated with the elite in ancient society.
6. Giant bells
The newest theory suggests the dolerites and sarsens at Stonehenge produce unique, subtly different sounds similar to hollow wooden or metallic bells. Because the sounds would have carried over long distances, these sounds could have been a form of primitive communication, or alternatively, they may have been used much as church bells are today. The idea of using rocks to make music isn't new; many other cultures have employed lithophones — essentially giant Flintstones-like xylophones that produce unique sounds.
7. Healing site
Many of the skeletons buried near the site bear marks of illness or injury, leading Geoffrey Wainwright and Timothy Darvill to propose the site was a spot for ancient healing. Lending credence to that theory, many of Stonehenge's bluestones have been chipped away over the ages, perhaps by long-lost pilgrims seeking protective or healing talismans from the location. Of course, Stonehenge may have built for many, some or none of these reasons, and odds are no one will ever know for sure.
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