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6 Questions

Views Newest Activity Votes

4

25

votes

2

answers

728

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Why do some planets have lots of $\mathrm{N_2}$ and others none?

atmosphere planetary-science nitrogen

May 17 at 10:33 Community♦ 1

2

25

votes

1

answer

641

views

How much have global GPP and biomass changed over Earth's history?

earth-history paleontology biomass

Sep 19 '17 at 8:07 plannapus 5,178

2

24

votes

2

answers

3k

views

Natural nuclear explosions

geophysics geology geochemistry uranium radioactivity

Jan 1 '19 at 13:39 Sérgio Meth 11

2

18

votes

3

answers

2k

views

Why does Earth have abundant oxygen in the atmosphere?

atmosphere geochemistry biogeochemistry geobiology great-oxidation-event

Apr 25 at 16:34 Community♦ 1

15

votes

0

answers

198

views

How much heat is transported from the interior to the surface in the form of hydration enthalpy?

geophysics plate-tectonics geothermal-heat

Dec 17 '18 at 3:20 It's Me 1

1

13

votes

6

answers

2k

views

Are there any photographs of mountains without significant erosion (on Earth or otherwise)

planetary-science mountains erosion

May 8 '17 at 4:58 Knob Scratcher 1,914

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