Why can't humans eat grass or other plants like other animals?

Humans absolutely can eat grass. In fact, grass seeds constitute the primary staple of the diet of most humans around the world. Wheat, barley, rice, corn, etc, are all grasses. Bamboo (shoots) is also a grass. read more

Animals that eat grass have adapted digestive systems. Some animals that don’t have these adaptations and that eat other kinds of leaves - like pandas or sloths - either must eat an awful lot of them (pandas) or else are conditioned to move very slowly because of their slow metabolism (sloths). read more

Animals such as cows, on the other hand, have a specialized stomach with four chambers to aid in the digestion of grass (a process called rumination). Aside from the digestion issues, a second problem with grass as a food source is the mastication. read more

Humans can digest some leaves like spinach and not others like grass because in our digestive system sikkam is not present but animals such as cow,buffelo ,etc. Is present even our ansesters can because presence of sikkam and now today sikkam is in the form of appendix is not working. read more