See page 26 in the document Systems Engineering Fundamentals, published by the U.S. Department of Defense, SUPPLEMENTARY TEXT PREPARED BY THE DEFENSE ACQUISITION UNIVERSITY PRESS: FORT BELVOIR, VIRGINIA 22060-5565, January 2001.
Here's an excerpt:
Evolutionary acquisition, by its nature, represents an “acquisition within an acquisition.” On one level, ...
On Apollo 16 Charlie Duke jumped up and fell on his backpack.
Duke said he rolled right to break his fall but still bounced onto his backpack, also called a portable life-support system, or PLSS.
Although, I can't find the source anymore, one time one astronaut almost fell on his back. NASA later stated, that this can be dangerous, because it could unplug some wires and hoses. That's all I know, If I find the source I will link it here.
The show has a black doctor working at NASA during the Mercury programme, and he seems to be pretty high ranking too.
My initial searches didn't turn up any clues, but there was a recap of the episode on CollectSpace that mentioned that the black doctor in episode 7 is a real person.
Colonel Vance Marchbanks (portrayed by actor Christopher Mann) was one of ...
The answer, I think, is almost certainly to reduce stresses associated with the sharp ends of the chevrons in the grousers, although the wheel designs differ in other details as well (see below).
As is well known, Curiosity has suffered a significant amount of damage to its wheels. Quoting from the reference above:
The tears result from fatigue. [...] The ...