Chemical changes to genes make twins’ pain differ
![](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2014/02/ticker_twins.jpg?fit=860%2C460&ssl=1)
Chemical changes to pain genes may explain different tolerances to pain, even in identical twins.
The National Guard/Flickr
Chemical changes to pain genes may explain different tolerances to pain, even in identical twins.
The National Guard/Flickr