This is CBS I In The World. I'm John Batsworth. David Livingston, Dr. Space of the Space Show.

He is with me on Hotel Mars and we're actually talking about Mars for once, with Professor

Alexis Rodriguez of the Planetary Science Institute. He with his team have discovered

events that happened 3.4 billion years ago on the surface of Mars, Northern Hemisphere.

And they discovered these things because their results of the event, the strike of an asteroid,

is all around the landing zone of Viking 1 in 1976, which was unaware of all of these

events until it landed. And I'm going to start with David's question of the remarks

that the professors helped us understand so far about the reasoning of this event. David,

you have a question for the professor. Yes, professor, I found it interesting that you

have an earth analog to poll crater, or the tickle loop, if I'm pronouncing it right,

crater. Can you talk about that and why you think that's an analog to poll crater?

Yeah, absolutely. So basically, the analogy is essentially that the craters have similar

dimensions. They generated similar megatonami, based on the simulations. The megatonami

is actually flooded inland areas to similar extents. Now, that's like the overall similarity

that is actually very striking. Some people actually ask me about the climatic effect of Mars

that poll could have had. And that's actually a very, very hard question to answer because

you've got to remember that a lot of what we know of the latest period climat of Mars

is controversial. So to answer that question, we would have to depart from assumptions,

that are white ranging today in today's hypothesis. So maybe if you have a thick atmosphere,

let's say, and a much warmer and water climate, then the impact could have essentially like affected

the global paleo climatic evolution of the planet at that moment, very similar to the earth

analog. Now, if the opposite was true, if the atmosphere was very thin, then the impact on the

...