Earth & Environmental Sciences
Mars
93%
selenium
84%
tellurium
67%
pyrite
57%
oil
55%
meteorite
53%
carbon
53%
fluid inclusion
49%
rock
49%
impact structure
46%
fluid
44%
mineral
41%
crater
40%
biomarker
40%
organic matter
40%
mineralization
40%
sulfate
39%
hydrocarbon
38%
sulfide
38%
shale
37%
Raman spectroscopy
37%
Ordovician
37%
biosphere
35%
sandstone
32%
trace element
31%
graphite
30%
geological record
30%
red bed
29%
coal
29%
methane
27%
gold
27%
sediment
26%
fluid flow
26%
fossil
25%
colonization
25%
basin
25%
black shale
25%
thermal maturity
24%
basalt
23%
feldspar
23%
weathering
22%
Proterozoic
22%
chert
22%
calcite
22%
Dalradian
21%
diagenesis
21%
granite
21%
oxygenation
21%
microbial activity
20%
material
20%
Physics & Astronomy
mars
100%
rocks
48%
sediments
39%
biomarkers
36%
minerals
35%
ice
35%
lakes
31%
hypervelocity impact
31%
biosphere
30%
organic compounds
26%
sampling
26%
fossils
25%
meteorite collisions
24%
basalt
24%
analogs
23%
sulfates
23%
gypsum
21%
water
21%
carbon
20%
Scotland
20%
methane
20%
meteorites
20%
Raman spectroscopy
18%
shales
18%
craters
17%
ejecta
17%
exobiology
16%
veins
16%
microorganisms
15%
crusts
15%
geochemistry
14%
habitats
14%
calcite
14%
sandstones
13%
inclusions
13%
shock
12%
histories
12%
carbonates
12%
habitability
12%
weathering
12%
signatures
11%
deposits
11%
European Space Agency
11%
volcanology
11%
fluids
10%
hydrothermal systems
10%
spectrometers
10%
projectiles
10%
SNC meteorites
10%
availability
10%