For generations, humans have had the competitive edge over other species on this earth because of one amazing feature we have that other creatures don’t. Our opposable thumbs. We have these amazing appendages and we use them to do things most other creatures couldn’t even begin understand. For those of you who don’t know, “an opposable thumb is a physical adaptation. An adaptation is a feature that helps a plant or animal survive in its habitat. Adaptations can either be physical (a part of the body) or a behavior an organism has developed.” Thumbs have helped us with things we normally could never do. They let us hold things, make tools to work and work those tools. They even let us give thumbs up. They do so much for us that we sometimes even forget how important they are. Years of evolution have let us go this far with thumbs and they will not stop now.