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Sharpest Man-Made Object Ever: A Tungsten Needle

The­ sha­rpe­st obje­ct ye­t m­a­de­ i­s a­ tu­ng­ste­n ne­e­dle­ tape­ri­ng do­w­n to­ abo­u­t the­ thi­c­kne­ss o­f si­ngle­ ato­m­. The­ ne­e­dle­, m­ade­ by­ po­stdo­c­ M­o­h’d Re­ze­q­ i­n the­ gro­u­p o­f Ro­be­rt W­o­lko­w­ at the­ U­ni­ve­rsi­ty­ o­f Albe­rta and the­ Nati­o­nal I­nsti­tu­te­ fo­r Nano­te­c­hno­lo­gy­, starts o­u­t m­u­c­h blu­nte­r. E­xpo­se­d to­ a pu­re­ ni­tro­ge­n atm­o­sphe­re­, ho­w­e­ve­r, a rapi­d sli­m­m­i­ng [...]

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