The large eyes of Neanderthals probably the cause of their extinction

A study that took place at the Oxford University by Eiluned Pearce, suggests that Neanderthals became extinct because of their big eyes, which are approximately 6mm more from top to bottom.

The study suggests that the extinction can be explained by the fact that most of the brain was used to process information coming in through sight, leaving less brain activity for other tasks. As a result they weren’t able to cope with the Ice Age and other rough conditions and became extinct. Professor Chris Stringer of the Natural History Museum also supports Eiluned’s theory, and additionally uses archaeological evidence to support this theory.  For example, Homo sapiens used needles to make clothing to keep them warmer, while the Neanderthals did not.

You can read more here.