A turn of phrase, maybe somebody's law, I don't know exactly..

But to send a rocket into space you need x fuel, but to transport x fuel you need y fuel to move x.

What is this called?

You need one litre to move a vehicle, but that one litre weighs so you need to bring in more fuel to move the fuel with the ship, etc etc etc..

What is this called?

oh, and we explain it down to a twelve year old girls understanding, please and thank you.

We can collect the fuel we need to get to Mars, but we need to add fuel to send the weight of the fuel and we add more fuel but need more to move the more weight.. and we never leave this circle.. what is this called?

if your 12 year old kid is properly educated then maybe this https://www.quora.com/...rths-orbit-from-sea-level

Tsiolkovsky rocket equation?

https://en.wikipedia.org/...iolkovsky_rocket_equation

Less so how a rocket gets to space, more so the concept of travel.. you need 1000 tonnes of fuel to get there, but then you need 900 tonnes to move that 1000 and then you need 800 to move that 900 etc etc and all you're doing is adding fuel to move the fuel.

Not how does a rocket break atmosphere.

I expect it from marshal, but diss is surprising.

E=mc2

The Big Bang Theory

I dont know if im supposed to be insulted or not... lol