  This paper analyzes team collaboration in the field of Artificial
Intelligence (AI) from the perspective of geographic distance. We obtained
1,584,175 AI related publications during 1950-2019 from the Microsoft Academic
Graph. Three latitude-and-longitude-based indicators were employed to quantify
the geographic distance of collaborations in AI over time at domestic and
international levels. The results show team collaborations in AI has been more
popular in the field over time with around 42,000 (38.4%) multiple-affiliation
AI publications in 2019. The changes in geographic distances of team
collaborations indicate the increase of breadth and density for both domestic
and international collaborations in AI over time. In addition, the United
States produced the largest number of single-country and internationally
collaborated AI publications, and China has played an important role in
international collaborations in AI after 2010.
