Earth & Environmental Sciences
hydrothermal vent
68%
Mars
53%
spectroscopy
48%
iron
38%
siderite
27%
thermal spring
25%
national park
20%
mineral
19%
exobiology
19%
nontronite
16%
planetary surface
15%
origin of life
15%
obsidian
14%
ferrihydrite
14%
stromatolite
14%
fluorescence spectroscopy
14%
sinter
13%
sample preparation
13%
robotics
13%
mineral deposit
12%
chert
12%
goethite
12%
smectite
11%
X-ray spectroscopy
11%
X-ray fluorescence
11%
diagenesis
11%
backscatter
11%
residence time
10%
spectrometer
9%
X-ray diffraction
8%
scanning electron microscopy
8%
clay
7%
habitat
7%
in situ
7%
world
6%
particle
5%
energy
5%
analysis
3%
Physics & Astronomy
Mars exploration
100%
vents
80%
Yellowstone National Park (ID-MT-WY)
41%
iron
41%
siderites
33%
spectroscopy
30%
minerals
28%
hematite
23%
mars
22%
mineral deposits
18%
obsidian
16%
exobiology
15%
robot arms
14%
planetary surfaces
14%
habitats
13%
spectral signatures
12%
montmorillonite
12%
clays
10%
field emission
8%
deposits
8%
x rays
8%
signatures
7%
spectrometers
7%
fluorescence
7%
preparation
7%
scanning electron microscopy
6%
diffraction
5%
energy
2%
Manitou (CO)
1%
Agriculture & Biology
ventilation systems
75%
spectroscopy
51%
hot springs
43%
iron
42%
siderite
41%
minerals
34%
hematite
33%
national parks
21%
sampling
20%
diagenesis
20%
ferrihydrite
19%
X-ray fluorescence spectroscopy
18%
smectite
18%
goethite
18%
springs (water)
15%
chocolate
14%
spectrometers
12%
spectral analysis
11%
X-ray diffraction
11%
clay
10%
scanning electron microscopy
8%
energy
6%
habitats
6%
Chemical Compounds
Hydrothermal Vent
93%
Mineral
37%
Spectroscopy
37%
Energy Dispersive X-Ray Fluorescence Spectroscopy
14%
Robotics
14%
Hematite
12%
Residence Time
12%
Surface
11%
Sample Preparation
9%
Amorphous Material
7%
X-Ray Diffraction
5%
Reaction Yield
4%