A 6,000-year-old tomb in Northern Spain provides valuable information about an ancient Neolithic community, according to a new study in the journal PLOS One. The tomb holds the remains of 47 individuals, laid to rest in several layers. Individuals in the bottom tomb were closely related, and family members were buried side-by-side, DNA analysis suggests. In layers above, however, the bodies appear to be missing skeletal parts, including skulls. The bones were manipulated, possibly for ritualistic purposes. . The analysis also showed that the community relied on cereals and other plant-based food for sustenance.