- Recent analyses have identified more than 500 stretches of DNA that were lost from the human genome but still exist in chimpanzees and other mammals.
- Three stretches appear to be DNA switches, and loss of two of them freed brains to grow and humans to evolve pair bonding with mates.
- Loss of another switch from our ancestors may have refined our upright gait, which freed our hands to make and carry tools.
Reno, Philip L., "Missing Links" (2017). PCOM Scholarly Papers. 1875.