At https://phys.org/news/2026-06-baby-fossils-reveal-link-human.html … a study of the remains of infants that lived between 50,000 and 75,000 years ago, such as their ancient baby teeth and bones, has revealed the growth of infant Neanderthals was very similar to that of modern humans.
At https://dailygalaxy.com/2026/06/neanderthal-dna-may-explain-human-language … researchers have found a tiny piece of DNA that may go all the way back into prehistory. This small portion of the human genome may have led to the development of language, they say. These sequences were already present in Neanderthals – at the transition fo modern humans.