This publication and the video, Slinky Scientific Shindig, made possible by Phillips Petroleum Company for National Engineers Week 1998. This ancient monument of huge, rough-cut stones standing alone on the Salisbury Plain in Wiltshire, England, has captured imaginations for centuries. No one knows exactly who placed them there or why.
Speculation ranges from human sacrifice to astronomy.
Two hundred to 300 years later, the sarsen stones were added. Perhaps the most impressive part of Stonehenge is how it was built. The first phase, the ditch around Stonehenge, was dug using antlers, bones and even bare hands. The bluestones, which weighed four tons each, came from over 240 miles away. They had to be floated by boat then carried across land.