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Time for a new book? We list our favorite spy novels of all time. Intrigue, suspense, drama... the greatest spy novels have it all! One thing about a ...

Ever wondered how rangefinders do their job so accurately? Or how the Romans measured distances to fire projectiles during their famous sieges? We tell all in ...

Camouflage patterns come in a huge variety but which are the best? Today we answer this question and find out what makes a camouflage effective. ...

Ever wondered how those massive planes stay hidden from view? We explain all in today's big guide on stealth technology. You have no doubt heard of ...

Natural evolution has resulted in some really innovative ways for animals to avoid capture and ambush their prey. Today we look at 8 of the best animal ...