Physics & Astronomy
isotope ratios
100%
mars
84%
gypsum
80%
sulfates
77%
sulfides
45%
bedrock
42%
sulfur
40%
weathering
40%
crusts
35%
fractionation
34%
sulfur isotopes
25%
Mars surface
25%
oxidation
20%
pyrites
19%
sediments
17%
robotics
16%
craters
16%
iron oxides
15%
soils
14%
derivation
11%
sampling
11%
histories
11%
cycles
9%
causes
8%
Earth & Environmental Sciences
impact structure
93%
isotopic analysis
88%
Mars
66%
sulfate
50%
gypsum
45%
marcasite
32%
sulfide
27%
sulfur
27%
bedrock
21%
weathering
19%
crust
18%
oxidation
15%
isotopic fractionation
14%
sulfur isotope
14%
robotics
13%
iron oxide
11%
microbial activity
11%
crater
11%
fill
10%
pyrite
10%
isotopic composition
10%
fractionation
9%
analysis
9%
sampling
6%
history
6%
sediment
5%
soil
5%
Agriculture & Biology
gypsum
85%
sulfates
61%
sulfur
60%
sulfides
58%
bedrock
50%
weathering
43%
oxidation
26%
pyrite
25%
isotope fractionation
25%
iron oxides
23%
sampling
19%
microbial activity
18%
isotopes
18%
sediments
16%
fractionation
15%
soil
9%