The Infernal Machine

This week, two stories about the strange power of the 1-800 number. Subscribe to SiriusXM Podcasts+ to listen to new episodes of 99% Invisible ad-free and a whole week early. Start a free trial now on Apple Podcasts or by visiting siriusxm.com/podcastsplus. Hosted by Simplecast, ...  عرض المزيد

In 1888, Willard Bundy created the first employee "time clock" — essentially a souped-up grandfather clock that could, for the first time, produce an accurate record of when workers arrived and left. Though Bundy’s aim was simple, his invention soon sparked a change in American l ...  عرض المزيد

Dynamite is a type of chemical explosive. Discover how explosives from gasoline to dynamite work in this episode of BrainStuff.

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In 1846, an Italian chemist discovered the volatile compound nitroglycerine, the first major breakthrough in creating man-made explosions since the invention of gunpowder a thousand years earlier. But almost everyone who experiments with the compound thinks it’s too dangerous for ...  عرض المزيد

ATF experts analyzed the scattered remains: a nine-inch-long, one-inch-wide pipe encased in a wooden box, secured with nails, rubber bands, screws, epoxy, three-quarter-inch black plastic tape, and half-inch filament tape. The explosive was two types of smokeless powder packed in ...  عرض المزيد

Story One – For Whom the Bell Tolls The German war machine’s efforts to turn the tide of conflict in its favour have given rise to numerous tales involving advanced and dangerous weaponry. But amidst the rumours of alien technology and paranormal experimentation, one story in par ...  عرض المزيد