5-axis turn-cutting CNC machines. I know exactly how they work and it still amazes me that they can do what they do at the speed they can do it.
Thank for that! I was deployed overseas during the DC-X days and apparently that kind of news never made its way into Stars and Stripes, which was all the news we had, pre-internet days.
DC-X showed that you could land a rocket tail first like god and 1950’s sci-fi intended. SpaceX’s real contribution was the demonstration supersonic retropropulsion. That is flying backward into the rocket plume at supersonic speeds to slow it down. The US government scientists behind DC-X were trying to get funds to build an experimental system to prove out supersonic retropropulsion but were told by the National Academies that there wasn’t enough research to prove that it could be done. They were told to do more basic research before moving to a demonstration flight. Since SpaceX owned their rockets and just went ahead and did it.
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We really like this guy’s videos. He covers a fair bit of what you talk about.
Probably the vast majority of modifiable health risk benefits comes down to a decent amount of daily moderate intensity aerobic work, eating plenty of fiber and only eating enough calories that you are lean.
If you live to a ripe old age probably going to become important to do some muscle building work too.
You don’t see many overweight people over 80…
Really? Most of my relatives that lived into their 90’s - and there were a bunch - there weren’t a one that was what you’d call, “svelt”. My relatives either died youngish - sub 65 - or lasted past 90.
The most in-shape elders in my life were my grandfather (brain tumor) and my father (eery tumor).
There was never any allocation because of their size: when that icy cold hand comes for you, it cares not how in shape you are.