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.
The Starship upper stage separated from its Super Heavy booster nearly four minutes into flight as planned.
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Ранее трансгендеры напали на туриста в отеле Таиланда и украли у него десятки тысяч рублей. Уточнялось, что иностранец пригласил трансгендерную женщину в номер. Позже она привела с собой двух подруг, и между гостями и мужчиной завязалась ссора.
2025年，加密货币总市值从大约 3.25 万亿美元下滑至 2.98 万亿美元。其中，比特币价格为88535美元，年内跌幅超5%。，更多细节参见同城约会