Researchers discovered a submerged platform from the building site that dates back 8,000 years.
Scientists find hunter gatherers used the site for thousands of years.
Analysis of hand and footprints in Italian cave system shows how the group moved around the vast system.
The Bronze Age victims are thought to have been killed by a neighbouring, rival culture.
Researchers analysed the genomes of 24 Stone Age individuals from five megalithic burial sites across Europe.
Study looks at the reasons behind "an enigmatic feature of the rock art" found at sites across Western Europe.
The prehistoric object was discovered in the 1980s but had never been studied.
Among the thousands of artifacts were fossilized skeletons of rabbits, sheep, donkeys, rhinos, bears and birds.
"It is impossible to know precisely what they were used for," said one researcher.
Evidence suggests ancient humans may have hunted the mammoth and then stored the meat at the bottom of a pond.
When the steppe peoples entered Europe in a bid to leave the plague behind, they would have unwittingly introduced the bacterium to entirely new populations which had never encountered it.
The hundreds of 9,000-year-old structures initially baffled experts when they saw them in satellite imagery.
Mammoth ivory, like modern elephant ivory, is durable and doesn't splinter easily, and so makes a good spear for hunting.