They were a science-fiction fantasy in the Bond movie “Thunderball,” a space-age gag in “Gilligan’s Island.” But a half-century later, jet packs actually exist. A California company called JetPack Aviation unveiled a functioning turbojet version two years ago, capable of staying aloft for 10 minutes, traveling at speeds up to 100 miles per hour. Current models are available only to the military, but David Mayman, the company’s founder, said he plans to introduce a commercial version within 18 months.
When searching for immediate, short-term shelter, look for trees (especially fallen trees), rocky overhangs, and caves. Trees are an obvious source of shelter and have many useful parts for building shelter including the trunk – which can be used as a support, the branches – which can be used as framework, and foliage – which can be used as insulating material.
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