Lost genes may help explain how vampire bats survive on blood alone
Existing on a blood-only diet is something no other mammal can do
![A vampire bat in flight at night](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2022/03/032322_RK_vampire-bats_feat.jpg?fit=1030%2C580&ssl=1)
Vampire bats (one pictured) have evolved to survive on blood exclusively, a unique ability possibly enabled by the loss of 13 specific genes.
Sherri and Brock Fenton