"People assume that there must somehow be a bigger explanation." ...

We've all seen those white streaks trailing behind jets, creating stripes against the blue sky. The lines are called contrails, short for condensation trails, and they appear when water vapor ...

Add Yahoo as a preferred source to see more of our stories on Google. I recently wrote a column about the "chemtrail" conspiracy theory, and to say it caused quite a stir would be a serious ...

As our resident myth-buster, Sarah Knapton has seen a thing or two. Now, she’s taking on some of the world’s best-known ...

(CNN) — We’ve all seen those white streaks trailing behind jets, creating stripes against the blue sky. The lines are called contrails, short for condensation trails, and they appear when water vapor ...

Contrails are human-made clouds. They are streams of condensation left behind from airplanes and rockets. Exhaust leaves water vapor that freezes into tiny crystals in the cold troposphere.

NEW ORLEANS (WVUE) - A bill that would ban so-called “chemtrails” in Louisiana advanced out of the state House of Representatives on May 29, despite scientific consensus that aircraft exhaust does not ...

BERLIN - FEBRUARY 07: An vehicle's exhaust pipe releases fumes on February 7, 2007 in Berlin, Germany. The European Commission announced new carbon dioxide (CO2) targets for car makers which the ...

BATON ROUGE, La. (AP) — As Louisiana Rep. Kimberly Landry Coates stood before her colleagues in the state’s Legislature she warned that the bill she was presenting might “seem strange” or even crazy.

Add Yahoo as a preferred source to see more of our stories on Google. We’ve all seen those white streaks trailing behind jets, creating stripes against the blue sky. The lines are called contrails, ...