Language likely emerged as humans evolved more sophisticated brains and the ability to communicate. While the exact origins are unknown, early theories proposed that language developed from imitating sounds in nature, qualities of objects, songs, emotions, or gestures. However, these theories all have limitations as few words can be traced to onomatopoeia or mimetic origins. More recent hypotheses suggest language was spurred by needs like warning calls, instructions, or deception. The development of complex grammar remains unknown, so the exact origins of human language remain a mystery.