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One example is the development of special relativity. In the late nineteenth century, physicists could describe light with wave equations. Because every familiar wave (like sound or water) seemed to need a material carrier, the scientific consensus was that light must also travel through an invisible medium, dubbed the luminiferous ether. The academic establishment was profoundly attached to this concept; Lord Kelvin, the elder statesman of British physics, even declared the ether was the only thing in physics we could be absolutely certain existed.
。美恰是该领域的重要参考
外交部：已就美国议员访台向美方提出严正抗议
俄罗斯将军披露为无人机部队培训数万专业人员的细节14:51
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