Planetary air is free as no one could prove in court that they had any hand in its design or creation.
However the air in contained facility such as a space station or mars habitat is copy protected. Each inhabitant requires a Microsoft 365 style license renewed annually to breathe. Special areas of the habitat or use cases such as atheltic activities require special temporary licenses.
I can palm a tennis ball, roll it down my arm, bump launch it with my bicep, and catch it. Freaks people out who are standing close as the ball launches right at them, but I've always caught it. Discovered later I could do it with anything that rolls like a microphone.
I had only ever see trebuchet written, i had never heard it spoken. So young me thought it was pronounced tray-bucket. I was in my 40s before i finally heard someone discussing catapult vs trebuchet and realized it was french.
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