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Leonardo da Vinci is usually credited with conducting the first systematic study of friction in the late 15th century, a subfield now known as tribology that deals with the dynamics of interacting surfaces in relative motion. Da Vinci's notebooks depict how he pulled rows of blocks using weights and pulleys, an approach that is still used in frictional studies today, as well as examining the friction produced in screw threads, wheels, and axles. The authors of this latest paper used an experimental setup similar to da Vinci's.
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这个词的诞生，与现在城市中越来越多出现的共享办公空间和远程办公方式有关。许多厌倦了“996”和通勤压力的年轻人，开始认真研究成为数字游民的可能性。社交平台上，关于如何进行远程工作、如何在旅居中生活的经验分享帖大量涌现，激发了人们对传统工作模式的重新思考。
A couple attempting to walk the coastline of mainland Great Britain plan to re-start their journey after their first attempt had to be abandoned when one of them suffered an injury.