The Reason Why Humans Can’t Eat Grass but Cows Can
Author: Jessica Zhang
Editors: Yanxi Chen and He-Hanson Xuan
Artist: Cici Zhang
Humans cannot digest cellulose, a main component of forage, so we cannot survive solely by consuming grass. Cows not only utilize cellulose as their primary source of energy but also produce dairy products.

Cows only have one stomach, but it is divided into four compartments: the rumen, reticulum, omasum, and a