You know there is water on both right?
If only there was an article which talked about water on the moon...
But seriously, since you're going to be unnecessarily pedantic, you're still wrong. Bones (even dry ones on earth) have a MUCH higher percentage of water content than the average location on Mars or the Moon.
Perhaps you could explain why nit-picking is so important? HN isn't a science forum. There's no expectation that people post full scientific justification (with references) for what they say.
It should be about people making polite conversation. Instead, you're missing the point entirely. Which is sad.
just like there is water in the most arid deserts on earth ... and still they are a jungle compared to moon and mars. So I think, boone-dry is a quite correct description ...
Adj. 1. bone dry - without a trace of moisture; as dry as a weathered bone
metapher - something not allways meant to be literal in a scientific sense. Bone dry is a very good description for a desert for a ordinary human beeing, as it means you wont find water you can use
For a desert on a planet, but not for an entire planet.
You sound ridiculous claiming Mars is bone-dry.
It is not a "very good description". It is false.
No, he is using the word incorrectly. They are not bone-dry.
The main difference is that Mars has sufficient weather that the dust is roundish, whereas the moon dust is composed of extremely sharp shards.
IMHO, if we can't make a go of it on the moon, we have no business going to Mars.