Babies in the womb have extra lizard-like muscles in their hands that ... It is unclear why the human body makes and then deletes them before birth. The biologists say the developmental step ...

The new scan is based on a substance found in the saliva of the Gila monster, a type of lizard native to desert ... saliva ...

"The parts of the brain that allow us to do this are in regions of the human brain that have expanded ... Often referred to as our "lizard brain," the amygdala is typically associated with ...