[gentle piano]
[Abigail Fraeman] The terrain around the
Curiosity rover is beginning to look very different.
The rover has driven over 16 miles since
landing in Gale Crater in 2012.
This view is from 1500 feet above our landing site.
We're climbing the side of Mount Sharp, a very tall mountain
in the center of the crater.
All of this dark material is Martian
sand that's made up of broken bits of volcanic rock.
Can you see the ripples that were shaped by the wind?
We had to drive around this massive sand sheet
as we climbed Mount Sharp.
Look how clear the air is.
That's because it's winter when there's less dust
in the atmosphere.
You can see all the way to the rim of Gale Crater,
which is about 20 miles away.
We spent the last several years
investigating clay-rich rocks that formed in lakes.
But now we're entering a region where rocks are filled
with salty minerals called sulfates.
These minerals form in drier conditions.
So we think this area might show us how the ancient
Martian climate was changing.
We're starting to see lots of very cool,
knobbly textured rocks like these.
We think these veins and nodules were created by groundwater.
Here we recently drilled our 32nd sample of the mission.
By studying the chemicals
and minerals in this rock, we can learn how the
ancient environment was changing as we go from the clay region
into the sulfate region.
And these hills are different
from anything we've seen on the lower mountain.
They're rounded
unlike the ridges and mesas we've seen before.
Now let's look ahead to where we're going.
We'll soon be entering a narrow
valley that should make for some amazing images.
On the left is Rafael Navarro Mountain,
named after one of the mission scientists who passed away
in January of 2021.
This nearby hill is huge.
It's about the size of a four-story building.
This changing terrain is more than just fun to look at.
It can teach us how Mars lost its water over time.
How long did conditions
that were favorable to life last?
We're looking forward to finding out.