This is CBSI on the world.

Behind the Black, 15 years of watching commercial space

and the exploration ahead of us watching that as well,

the Earth Moon System and eventually the Mars Earth Moon System.

We begin with a Mars story, and I want to establish something, because I read all these

Nature and Science Magazine's version of Mars and water.

Bob, is it fixed that water flowed on Mars, or is that still the debate?

First, John, I have to thank your readers for their donations and subscriptions to Behind the Black,

as I do my monthly, my 15th anniversary's fundraising thing, I really appreciate their support.

You'll listen to support, and I want to thank them.

And no, it is not settled that water flowed on Mars.

There is ample evidence that suggests water might have flown on, but flowed on the surface

of Mars once, liquid water.

But the problem with that has continued always to be that Mars atmosphere is too cold and

too thin for liquid water to exist.

If ice is on the surface and it starts to get heated, it will immediately sublimate into a gas.

It will not become a liquid and flow.

It just doesn't, it can't happen with the atmosphere and the temperatures on Mars.

And there have been many, many models created to try to create the situation where once

Mars had a thicker warm and climate that would allow water to flow.

But none of those models has really satisfied anybody.

None.

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