Timeline for Life under the surface of Ganymede
Current License: CC BY-SA 3.0
8 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Mar 12, 2015 at 20:36 | comment | added | Isaac Kotlicky | @celtschk Except that the hydrothermal vents here on earth are driven by magma seeping through the crust on the ocean floor. It doesn't look like that would be applicable on Ganymede - it's not hot enough in the core to drive magma eruptions in a closed system (the outer shell). On earth, the gaseous pressure would be relieved into the atmosphere. We'd see cracking crust on Ganymede if that was happening. | |
| Mar 12, 2015 at 20:09 | comment | added | celtschk | Actually one of the hypotheses about the origin of life on earth is that it started at hydrothermal vents. | |
| Mar 12, 2015 at 18:43 | comment | added | David Rice | James - what Isaac is talking about (I think) is that prior to life existing near the surface the bottom of the ocean lacked both the molecular "stuff" and the environment to create life. | |
| Mar 12, 2015 at 18:23 | comment | added | James | Also I am pretty sure that the base species for deep sea vent ecosystems is chemo-synthetic bacteria. | |
| Mar 12, 2015 at 18:20 | comment | added | James | I am not saying something like an earth deep ocean system is impossible even if I am correct, but didn't life evolve nearer the surface and then adjust to living at the oceans depths on earth? | |
| Mar 12, 2015 at 18:11 | review | Low quality posts | |||
| Mar 12, 2015 at 19:08 | |||||
| Mar 12, 2015 at 17:51 | comment | added | Isaac Kotlicky | That's exactly why I was thinking that - most life on earth used solar energy at least as a system input if not directly. Ocean vent environments only exist due to detrius successively filtering down the zones to the ocean floor. Not sure about whether it would be anoxic under the crust, and whether that might encourage non-carbon life... | |
| Mar 12, 2015 at 17:38 | history | answered | David Rice | CC BY-SA 3.0 |