Contrails

Looking up instead of down for a change.

"Condensation trails or contrails form when hot humid air from jet exhaust mixes with environmental air of low vapor pressure and low temperature. The mixing is a result of turbulence generated by the engine exhaust."

The definition tends to take away some of the magic...but there is also a conspiracy theory involving contrails and some interesting facts.

"For a long time, those of us who think of ourselves as reality-based have snickered at the conspiracy theorists who argue that contrails–those wispy streams of ice and pollution particles in the sky left behind by jet aircraft–actually are signs of a clandestine government effort to modify the weather.

But now, as it turns out, maybe we shouldn’t have been quite so dismissive. While there’s still no evidence that contrails are part of an insidious cabal, a new study published in International Journal of Climatology and detailed in this press release, reveals that they actually can influence temperatures on the ground and local weather patterns." - Discovery News

Who knew?

I took this before the headache started...
Just need to muscle through now.