Last Saturday was one of the busiest days ever in air travel. Here’s a visualization…..

The skies look a lot more crowded today than they did a century ago. At any given moment, there are 9700 airplanes traveling through the air on average. Saturday, June 30 was an especially busy day for air travelers: Flightradar24 recorded 202,157 flights, the most the flight-tracking app has ever documented in a single day.

Read more ... http://www.newadvent.org