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? Facebook Prev Article Next Article Discover Checkout these cool gadgets... Related Posts What if NASA had the US Military’s Budget? What Are You? Is There A Bermuda Triangle In Space? Inside the Gigafactory, Where Tesla is Building its Future Should We Even Try to Extinguish Wild Fires? What Actually Happens to All Your Deleted Files?