In absence of HUMANS, the Earth would be a giant Zoo and much more peaceful!
Have you ever wondered what would the world look like, assuming humans never existed?
Study reveals it would have more mammals and also be a better place to live in.

Current levels of mammal biodiversity on Earth charting number of large mammals species per 100kmx100km area. Illustration by Soren Faurby

source: www.techworm.net