It is blocked by air.
To travel
Airplanes reduce travel time. and they are also a safer way to travel.
Airplanes
Airplanes had expedited traveling and could travel over any terrain. Land, Sea, Mountain,etc...
No, that's way before the invention of airplanes.
fast...
Airplanes are the fastest way to travel a long distance. - Over short distances, some trains may be faster
they get dispersed and loose their momentum. that is the wave is no more able to vibrate the air..
your ears can blead and pop if the driver goes to fast
the traveled by chairs
Very few people take airplanes on a daily basis. The overwhelming majority of the population ride in cars not airplanes. Air travel is limited to long distance travel.
travel really took off (pun intended)