Because humans are bipeds with opposable thumbs, they can create tools more skilfully than other species. Humans inhabit almost all areas of the planet, using technology to overcome inhospitable environments. They are the only species to deliberately control fire to cook food. | Because humans are bipeds with opposable thumbs, they can create tools more skilfully than other species. Humans inhabit almost all areas of the planet, using technology to overcome inhospitable environments. They are the only species to deliberately control fire to cook food. |