I didn't see anything in the article that supported this conclusion. We did not evolve from chimps, we share a common ancestor, but we evolved (and continue to

I didn't see anything in the article that supported this conclusion. We did not evolve from chimps, we share a common ancestor, but we evolved (and continue to evolve) independently. We may have lost this ability or we may have never had it. Chimps could have developed it after branching off.