[r0muald]

I totally understand being very cautious about their findings, but the wording of this paragraph struck me as odd:

> The ratio that Curiosity found in the Cumberland sample is about one-half the ratio in water vapor in today's Martian atmosphere

> suggesting much of the planet's water loss occurred since that rock formed

> However, the measured ratio is about three times higher than the ratio in the original water supply of Mars, based on the assumption that supply had a ratio similar to that measured in Earth's oceans

> This suggests much of Mars' original water was lost before the rock formed.

So I guess a lot of water was lost both before and after the formation of the rock, and they only have ballpark figures for the hypothetical amounts?

[InclinedPlane]

Correct.