Fact 1: Humans have collected and grown mushrooms for food for thousands of years.

Fact 2: Humanity's use of mushrooms extends back to Paleolithic times.

Given the two facts above, answer the question "Since when have mushrooms been eaten?" with the following options: 
- Medieval times
 - To keep their body heat.
 - Paleolithic times
 - it keeps an organism warm
 - the body's largest organ
 - The Great Depression
 - important habitats
 - Modern times


 

   Paleolithic times      