A family in Turkey who walk on all fours appears to defy everything we thought we knew about human evolution.

Some members of the Ulas family have a quadrupedal gait that had never been reported in adult modern humans before their discovery.

The were first documented in a scientific paper before a BBC documentary titled The Family That Walks on All Fours was released in 2006. The discovery left scientists absolutely baffled.

https://www.dailystar.co.uk/news/weird-news/inside-family-who-walk-fours-30802317