A surprise RSL in Melas Chasma, Mars. Image credit: HiRISE-ASU.

A surprise RSL in Melas Chasma, Mars. Image credit: HiRISE-ASU.

Happy Monday, Earthlings!

We are back! Going to start back by talking about what in the world are RSLs!

Recurring Slope Lineae are thin, wet-looking materials slumping out of the walls of craters on Mars. But these little guys are tricky- we don't have a definite answer for how these are formed, what material, or why they are rare!

So this is what we hypothesized:

1- they are seasonal, which means they grow and extend a couple meters in the Spring and fade in the Winter.

2-it is briny (very salty) water, but the movement processes are still yet to be understood

3-most features usually darken as the water evaporates, leaving behind the salt, but some features brighten. Reasons are still unknown.

4-Lab experiments are still being used to figure out how RSLs seep out of crater walls and flow down a slope!

Streaks near Olympus Mons volcanic base. Image credit: HiRISE-ASU

Streaks near Olympus Mons volcanic base. Image credit: HiRISE-ASU

Thank you for reading and come back next week for an overview of the Mars 2020 rover!