Physics & Astronomy
mars
100%
oceans
91%
deuterium
78%
magma
55%
atmospheres
39%
escape
27%
water
26%
greenhouses
25%
light water
25%
time measurement
22%
Curiosity rover
17%
SNC meteorites
17%
hydrogen
17%
hydrological cycle
17%
Mars Science Laboratory
16%
condensing
12%
Venus (planet)
12%
outgassing
11%
heating
11%
fractionation
11%
causes
11%
surface water
11%
clays
10%
freezing
9%
surface temperature
9%
condensation
8%
chemistry
8%
histories
7%
vapor phases
7%
crystallization
7%
gases
4%
interactions
3%
temperature
2%
Earth & Environmental Sciences
deuterium
97%
Mars
78%
ocean
48%
atmosphere
33%
magma
28%
hydrogen
21%
warming
14%
water
14%
Martian meteorite
13%
Venus
10%
loss
9%
gas
9%
hydrological cycle
9%
accretion
8%
condensation
8%
freezing
8%
partitioning
7%
fractionation
7%
surface temperature
7%
crystallization
7%
surface water
6%
clay
6%
science
6%
history
5%
laboratory
4%
chemical
4%
comparison
3%
temperature
3%
Chemical Compounds
Deuterium(.)
76%
Protium(.)
64%
Surface Temperature
27%
Degasification
26%
Surface Water
22%
Hydrogen
21%
Fractionation
18%
Reaction Yield
17%
Condensation
15%
Crystallization
14%
Surface
13%
Chemistry
12%
Gas
11%
pH Value
8%