A team of researchers has identified 87 Neanderthal footprints found on an ancient shoreline on the Iberian Peninsula, phys.org reports. Researchers found evidence of as many as 36 individuals walking along a beach. The work involved studying footprints left on Matalascañas beach, in Doñana National Park, in Spain. Testing in sedimentary rock showed the footprints to be about 106,000 years old. They were revealed recently due to heavy rains. Researchers did not find evidence to explain why such a large group of Neanderthals was walking along a beach, but suggest they might have been hunting or fishing.