For experienced ultra-runners the challenge of self-sufficient running in the extreme heat of the Sahara is too good to ignore.

CNN: 220 km Sahara desert run: 'The toughest race on Earth'

Clinton took heat for his loose self-enforcement of the rules.

WSJ: Why Golf and Politics Don't Mix | Golf Journal by John Paul Newport

Inventables' most recent shipment included a self-heating can that contains calcium oxide and water, which mix and heat up when users press a button on the can.

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