<human>:  What is the history of acupuncture?
<bot>: Acupuncture is an ancient practice that can be traced all the way back to around 100 BC, when it originated in China. It was initially used to treat illnesses and alleviate pain, and while its effectiveness was widely accepted, its philosophy of energy and vital life force only gained mainstream acceptance in the 20th century. Since then, it has gained traction and popularity in other countries, including the United States, where it is increasingly used to treat both physical and mental conditions. Acupuncture involves stimulating specific points on the body with very thin needles, which are said to help balance the energy and blood flow in the body.