Vine or branch in hand, gorillas and chimps are emboldened to attack their reflection in a mirror.

𝗔 𝗺𝘂𝘀𝘁 𝗿𝗲𝗮𝗱 𝗶𝘀 𝘁𝗵𝗲 𝘀𝗰𝗶𝗲𝗻𝘁𝗶𝗳𝗶𝗰 𝗲𝘅𝗽𝗹𝗮𝗻𝗮𝘁𝗶𝗼𝗻 𝗼𝗳 𝘁𝗵𝗲𝘀𝗲 𝗴𝗿𝗲𝗮𝘁 𝗮𝗽𝗲𝘀’ 𝗯𝗲𝗵𝗮𝘃𝗶𝗼𝘂𝗿 𝗯𝘆 𝗝𝗶𝗺 𝗔𝗻𝗱𝗲𝗿𝘀𝗼𝗻, 𝗣𝗿𝗼𝗳𝗲𝘀𝘀𝗼𝗿 𝗘𝗺𝗲𝗿𝗶𝘁𝘂𝘀 𝗼𝗳 𝗞𝘆𝗼𝘁𝗼 𝗨𝗻𝗶𝘃𝗲𝗿𝘀𝗶𝘁𝘆. Most humans recognize themselves in