More than 3,000 years ago on the open steppes of Mongolia and eastern Eurasia, nomadic herders were experimenting with equine dentistry.
원문출처 : https://www.cnn.com/2018/07/04/sport/horse-dentist-mongolia-spt/index.html
원문출처 : https://www.cnn.com/2018/07/04/sport/horse-dentist-mongolia-spt/index.html