This story was originally featured on Fortune.com
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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在一家体验工坊里，返乡创业的李志华正对着手机直播，屏幕那头，是对乡村文化好奇的网友，屏幕这端，研学团队的孩子们正在体验刷墨、拓印。
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