Teeth from two Neanderthal individuals in Jersey cave date to 48,000 years ago. Seven teeth mix Neanderthal roots with modern human crowns and necks. This provides strongest direct fossil evidence of Neanderthal-sapiens interbreeding. No DNA extracted yet due to preservation issues. Isolation unlikely as Jersey connected to France during Ice Age. Hybrids surprising in northwest Europe where modern human evidence was eastern. Europeans carry 2% Neanderthal DNA from ancient sex. Neanderthals and sapiens overlapped thousands of years before Neanderthals vanished 40,000 years ago. Site occupied by Neanderthals for 200,000 years with mammoth bone heaps. Other hybrid evidence includes Romanian jaw with 9% Neanderthal DNA and Russian child with Neanderthal-Denisovan parents. Teeth endure better than bones due to mineralized enamel.