This is John Batchelor, conversation with my good friend Dr. Ken Kroswell, an astronomer

writing its proceedings of the National Academy of Sciences about the information we get from

Insight, the NASA probe, for the interior of Mars, set down to test the

quakes, the Mars quakes. The information now tells us about the profile of Mars, the mantle. The positive one negative about the experiment so far. There's much more of this next week.

This is a preview of the Mars Quake report from inside.

Dr Ken Kroswell National Academy of Sciences, Mars, the beginning of the exploration.

More of this in the new week.

No, no, we didn't know anything about Quakes on Mars.

In fact, we didn't even know with 100% assurance that there were Quakes on Mars. In fact, we didn't even know with 100% assurance

that there were Quakes on Mars prior to the Insight mission.

So it was just luck that one of the most active regions

on Mars, the Insight happened to land fairly close to.

This region is called Surberis Fosse, it's east of the lander, but it's not that far east.

And as a result, the spacecraft was able to detect a lot of quakes from that region,

and that, of course, helped probe the beneath the surface of the planet Mars.

So that was the good surprise.

The bad surprise, I know you're going to ask me about that,

was, well, there weren't as many quakes overall as we'd hoped,

and they weren't as strong as we'd hoped as I mentioned earlier

the strongest was magnitude 4.7 which is not all that strong but nevertheless

because in particular of meteoroid impacts, impacts of objects hitting the surface of Mars, we were able to learn some new things about both the mantle of Mars and also the core of Mars. Thank you.