delinquent noun [C]. âº a âperson, usually âyoung, who âbehaves in a way that is âillegal or not âacceptable to most âpeople: âjuvenile delinquents.
Sahelanthropus may have walked on two legs. The oldest evidence for walking on two legs comes from one of the earliest humans known, Sahelanthropus. Walking upright may have helped this species survive in the diverse habitats near where it livedâincluding forests and grasslands.
The clearing of forests drove a need to descend from the trees and walk upright (bipedal) - offering the advantages of faster speed over ground and a better vantage point to survey the surroundings whilst freeing the hands to carry objects or forage for food.