A new study found a simple and powerful way to control particles and form crystals: illuminating them. The research provides a simple and reversible method for forming crystals that can be used to develop a new generation of adaptable materials.

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"Trends that would have unfolded in a season are now taking up to 48 hours and I would say [creatives] have made fashion faster, more democratic and far more conversational."

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从生理机制上看,脂肪组织并非单纯的能量储存器官,而会分泌多种激素,其中包括瘦素(leptin)。这一激素在大脑调控生殖轴的过程中发挥着一种“许可”作用:当身体能量储备充足时,大脑更容易启动与生殖发育相关的信号通路。换言之,如果一个机体长期在能量营养丰富的环境中,它也更容易启动青春期。但科学家也观察到,许多出现性早熟的女孩并不肥胖。

曾国藩的前辈老乡、大儒王船山的话更厉害——比如,为储粮备荒、平抑物价、赈灾救急等等,历代由朝廷或地方乃至乡绅出资建义仓、社仓,这是不是慈善?当然是。可是王船山反复批评这种义仓、社仓。为什么?因为它的作用有限而流弊益多,且以公义之名,蔽人眼力、阻人思想。正如当今由单位机构出钱组织义务写春联、送春联,固然是善事,但这种公益活动的流弊实在太大,同样以公义之名,蔽人眼力、阻人思想、消解人参与体验。

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