A crocodile DNA study has revealed two previously unknown Crocodylus species in the Caribbean. The crocodiles live on Cozumel and Banco Chinchorro, where they're threatened by human activities.

In the book "Adaptable," evolutionary anthropologist Herman Pontzer explores human biology and development, and how people have evolved to survive everywhere on Earth.

By targeting three key growth pathways at once, researchers eliminated pancreatic tumors in multiple mouse models and prevented the cancer from returning, a promising step toward overcoming treatment resistance.