- Monkey business: Neanderthals and ancient apes likely kissed too France 24
- First kiss dates back 21 million years, say scientists BBC
- A new analysis suggests kissing on the lips may have evolved 21 million years ago CNN
- Neanderthals and early humans ‘likely to have kissed’, say scientists The Guardian
- Ape ancestors and Neanderthals likely kissed, new analysis finds Phys.org
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