According to evolutionary biology, everyone is hardwired to find the youngest member of our own species adorable. This is so that we will naturally feel inclined to care for, and protect the baby from any potential harm. It helps that all babies are born with cute features such as (taken from: http://www.stuffyoushouldknow.com/blog/babies-cute-explained/):
- large head relative to body size, rounded head
- large, protruding forehead
- large eyes relative to face, eyes below midline of head
- rounded, protruding cheeks
- rounded body shape
- soft, elastic body surfaces