Green blood in lizards probably evolved four times
Studying the bizarre color might someday offer insights into human jaundice
![green blooded lizard](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2018/05/051618_SM_green-lizard-blood_feat.jpg?fit=860%2C460&ssl=1)
BLEEDS GREEN The few lizards with green blood, such as this green skink from Papua New Guinea, may have acquired the coloring via a spotty pattern of evolutionary history. Their muscles, bones, tongues and gums also look greenish.
C. Austin