Anxiety is growing over a potential war between Iran and the US in the Middle East, with embassies evacuating staff and airlines cancelling flights as tensions mount.
Without agar, countries could not produce vaccines or the “miracle drug” penicillin, especially critical in wartime. In fact, they risked a “breakdown of [the] public health service” that would have had “far-reaching and serious results,” according to Lieutenant-General Ernest Bradfield. Extracted from marine algae and solidified into a jelly-like substrate, agar provides the surface on which scientists grow colonies of microbes for vaccine production and antibiotic testing. “The most important service that agar renders to mankind, in war or in peace, is as a bacteriological culture medium,” wrote oceanographer C.K. Tseng in a 1944 essay titled “A Seaweed Goes to War.”3
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在拍摄夜景、烟花或者红灯笼时，手机的测光系统往往会因为想要「看清」黑暗，而把画面提得太亮，导致灯笼变成一团白光，夜空全是噪点。这时候，你只需要点击屏幕对焦主体，然后按住旁边的小太阳图标，往下拉。不用怕画面变黑，压低曝光不仅能找回高光的细节，让灯笼红得通透，还能压暗背景的杂乱，让主体更加突出。
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