Why Do Planes Fly So High?

We’ve all been flying high ever since the development of the jet engine in the mid-1950s. But why were jets were designed to fly at those high altitudes in the first place? Hosted by: Hank Green ---------- Dooblydoo thanks go to the following Patreon supporters -- we couldn t make SciShow without them! Shout out to Justin Ove, Chris Peters, John Szymakowski, Peso255, Fatima Iqbal, Justin Lentz, and David Campos. ---------- Like SciShow? Want to help support us, and also get things to put on your walls, cover your torso and hold your liquids? Check out our awesome products over at DFTBA Records: http://dftba.com/scishow Or help support us by becoming our patron on Patreon: https://www.patreon.com/scishow ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Instagram: http://instagram.com/thescishow Sources: http://www.airliners.net/aviation-forums/tech_ops/read.main/56218/ http://www.decodedscience.com/why-do-jet-airplanes-fly-at-high-altitudes/9815 https://www.grc.nasa.gov/www/k-12/BGP/PAT/Fuel_and_Air2_act.htm https://www.grc.nasa.gov/www/K-12/airplane/lift1.html