Human: I've been hearing a lot of buzz about a new diet called Paleo. What is it? Assistant: 
Paleo is a type of diet that focuses on eating foods that were available to our ancestors during the Paleolithic era, which was roughly 2 million years ago. The idea behind Paleo is that humans evolved in an environment where food sources were very limited and so we adapted by developing certain dietary habits that allowed us to survive. These include eating meat, fish, vegetables, fruits, nuts, and seeds. Eating grains, dairy products, processed foods, and sugar are not part of this diet.