The sky high Stratosphere offers four high-altitude outdoor thrill rides of its own, including the newest, SkyJump, a controlled free fall - from 108-floors up!

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They involve an abrupt jump in temperatures high in the stratosphere, which can bring snow.

BBC: Freezing weather forecast for weekend

Runaway climate change could spur an island nation doomed to drown under rising seas or a wealthy entrepreneur with do-good intentions to deliberately inject sunlight-reflecting particles high into the stratosphere in a bid to cool the planet, the World Economic Forum warns.

MSN: The Maya may have sacrificed earliest domestic turkeys

The second one, which begins in the mid-1970s, is much more suspicious because it has been accompanied by a cooling of the stratosphere and is accentuated at high latitudes in the Northern Hemisphere and in the winter, which is what one would expect from increasing CO2.

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Facebook, Zynga, LinkedIn and other high flying Bay Area start-ups have launched their founders and investors into the billionaire stratosphere (at least on paper).

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