Hot Student Stories
top-5-grammar-and-spelling-checkers-to-rock-in-2019

What has been the single most important factor of human life?

Craig Stewart

in Self Improvement

follow
followin
1 answer
1 view

1 answer


Curtis Rhodes on July 22, 2019

The opposable thumb. Without that feature, people could not pick things up. They could not hold tools well, nor could they throw stones to protect themselves. In fact, having opposable thumbs meant that humans could develop the huge intellects and intelligence they have.


Add you answer