to carry molten lava, but is now home to  extremophiles. These tubes are super cool,  

but I’m not here to look for life. I’m here  to look for xenoliths, which are some of the  

oldest rocks on earth. They can be billions  of years old. By analyzing this type of rock  

and trying to figure out what they’re made of, we  can then correlate it with the supernova that was  

potentially responsible for their formation. Now  that’s a big deal, like trying to figure out how  

the solar system was formed big deal. After  40 minutes of walking on Mars, we made it.  

We got data. We’re seeing lots  of heavy elements like silicon,  

iron, magnesium and those are very common  elements churned up in the core of stars.  

Okay. I think I got what we need. Let's head  back to the Hab. Let us know in the comments  

if you want to learn more about my mission  in a Mars simulation. Thanks for watching.