Scorpion’s sting evolved from insects’ defensive proteins
![](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2014/01/scorpion_free.jpg?fit=860%2C460&ssl=1)
A single genetic deletion may have transformed some of the defensive proteins in insects into toxins that this emperor scorpion and other species use to deliver their deadly sting.
Mike Baird/Wikimedia Commons