Cities may be the defining element of human civilization.
The path from hunter-gatherers in the Paleolithic era 25,000 years ago to the high-tech, high-wonder jumble we inhabit today runs straight through cities. In traveling that path, our construction of cities has always been a dance with physics. In some cases, that physics was explicitly understood; in others, its manifestation was only recognized in hindsight.
As our cities have become more complex the physics embodying their behavior and organization has also become more nuanced, subtle and profound.
Nathan Heffel reports from Lockheed Martin on All Things Considered
Astronaut Bruce McCandless has been involved with the U.S. Space Program for decades. He worked in ground control during Neil Armstrong’s first step on the moon in 1969. In 1984, he became the first man to spacewalk untethered in an MMU, or Manned Maneuvering Unit.