HumansEarly hominin Lucy had powerful arms from years of tree-climbing Evolving to walk on the ground didn't stop our famous ancestor and others of her species spending a lot of their time up trees 51¶¯Âþ
LifeChimps and bonobos interbred and exchanged genes Humans are not the only great apes to have had an ancient fling with related species. New evidence shows that chimps carry genes from bonobos 51¶¯Âþ