In a widely cited series of studies in the late 1990s and early 2000s led by Professor C. Raymond Knee at the University of Houston, researchers found that people who believed relationships were "meant to be" were far more likely to doubt their commitment after conflict. Those with more growth-minded views tended to stay more committed, even on days when they argued.
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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Does new science get us closer to finding out how life on earth began?BBC Inside Science
(Image credit: Sean Rayford/Stringer via Getty Images)
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