We at BPL move around the world every day using airplanes. That’s why we want to reveal you 5 curiosities about them:

1.Airplanes are designed to withstand lightning strikes

Planes are designed to be struck by lightning—and they regularly are hit. It’s estimated lightning strikes each aircraft once a year—or once per every 1,000 hours of flight time. Yet, lighting hasn’t brought down a plane since 1963, due to careful engineering that lets the electric charge of a lightning bolt run through the plane and out of it, typically without causing damage to the plane.

2.You don’t need both engines to fly

The idea of an engine giving out mid-flight sounds frightening, but every commercial airplane can safely fly with just one engine. Operating with half the engine power can make a plane less fuel-efficient and may reduce its range, but planes are designed and tested for such situations. Any plane scheduled on a long-distance route, especially those that fly over oceans or through uninhabited areas like the Arctic, must be certified by the Federal Aviation Administration (FAA) for Extended-range Twin Operations (ETOPS), which is basically how long it can fly with one engine. In fact, most airplanes can fly for a surprisingly long distance with no engine at all, thanks to something called glide ratio. Due to careful aeronautical engineering, a Boeing 747 can glide for two miles for every 1,000 feet they are above the ground, which is usually more than enough time to get everyone safely to the ground.

3.Why planes leave trails in the sky

Those white lines that planes leave in the sky are simply trails of condensation, hence their technical name of “contrails.” Plane engines release water vapor as part of the combustion process. When that hot water vapor is pumped out of the exhaust and hits the cooler air of the upper atmosphere, it creates those puffy white lines in the sky. It’s basically the same reaction as when you see your breath when it’s cold outside.

4.The tires are designed not to pop on landing

The tires on an airplane are designed to withstand incredible weight loads (38 tons!) and can hit the ground at 170 miles per hour more than 500 times before ever needing to get a retread. Additionally, airplane tires are inflated to 200 psi, which is about six times the pressure used in a car tire. If an airplane does need new tires, ground crew simply jack up the plane like you would a car.

5.There is no safest seat on the plane

The FAA says there is no safest seat on the plane, though a TIME study of plane accidents found that the middle seats in the back of the plane had the lowest fatality rate in a crash. Their research revealed that, during plane crashes, “the seats in the back third of the aircraft had a 32 percent fatality rate, compared with 39 percent in the middle third and 38 percent in the front third.” However, there are so many variables at play that it’s impossible to know where to sit to survive a crash. Oh, and plane crashes are incredibly rare!