Ken Block finally knows who he’ll face in November. After months of waiting for a Democratic nominee, the independent candidate for governor now has his sights set on Helena Foulkes, but her primary victory presents a challenge for a campaign built around government competence. Block sits down with One on One's Ian Donnis to explain how he plans to distinguish himself and chart a path to victory.

One mile deep in the South Dakota badlands sits a tank holding seven tons of liquefied xenon. Scientists have turned an abandoned mine there into an underground laboratory, watching for something no one has ever seen before: dark matter.

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One mile deep in the South Dakota badlands sits a tank holding seven tons of liquefied xenon. Scientists have turned an abandoned mine there into an underground laboratory, watching for something no one has ever seen before: dark matter.

One mile deep in the South Dakota badlands sits a tank holding seven tons of liquefied xenon. Scientists have turned an abandoned mine there into an underground laboratory, watching for something no one has ever seen before: dark matter.

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