On Jan. 16, 2020, the Mars Reconnaissance Orbiter (MRO) captured this image of two types of sand dunes on Mars: barchan and linear dunes. The small dots are called barchan dunes, and from their shape we can tell that they are upwind. The downwind dunes are long and linear. These two types of dune each […]
Posted on
March 8, 2024
Sign up for our newsletter:
Categories
3
1
2
42
1
4
125
23
1
2
25
1
1
287
183
3
6
6
1
39
10
132
1
49
10
2
1
14
222
1
4
30
2
1
131
32
22
99
4
10
2
28
6
1
4
1
1
1
4
129
8
19
29
6
8
2
27
15
6
1
15
3
1
2
1
145
2
34
15
1
94
40
2
87
2
1
1
10
2
14
5
14
6
1
52
143
1
22
193
41
15
1
79
28
97
10
24
3
1
1
10
51
5
10
11
6
17
17
1
3
40
12
2
10
2
1
274
2
316
1
1
203
6
61
2
4
324
1
1
6
1
1
1
2
1
3
3
18
2
3
17
1
9
3
3
1
11
1
36
5
13
586
1
28
9
5
5
1
4
2
1
348
1
319
150
1
1
4
1
Blog Posts
A Winter Blanket Covers North Carolina
February 6, 2026
NASA Selects Two Earth System Explorers Missions
February 5, 2026
Career Spotlight: Welder (Ages 14-18)
February 5, 2026