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I think it's possible that life evolved in two directions. There's sun based evolution and Earth based evolution, because these are the fundamental energy sourc

by Geee 5y ago

I think it's possible that life evolved in two directions. There's sun based evolution and Earth based evolution, because these are the fundamental energy sources for life. Some creatures crawled on land, and some creatures went deeper into the ground. The land creatures evolved into intelligent beings, but we don't know about the others. If we assume that UFOs and aliens are real, then I think the most likely origin for them is the deep Earth, not space.

catlifeonmars 5y ago
By definition, they wouldn’t be aliens then, would they?
- Geee 5y ago
  Well, depends on how you define it. Another intelligent species which we call 'aliens'.
  - antonvs 5y ago
    Some people call other humans "aliens." The US does that to help justify what is effectively indentured servitude for manual laborers.
echelon 5y ago
If there's another industrialized civilization on earth, we would have seen evidence of it.
- Geee 5y ago
  That's true. However, there wouldn't be much evidence if there's only a relatively small amount of them, or they're really good at hiding their activity. It's also possible that their civilization peaked millions of years ago and they are now mostly existing in some kind of post-biology state, which wouldn't show any signs to the surface.
- BurningFrog 5y ago
  On Earth, sure. Inside it, maybe not!
- mustbeanexpert 5y ago
  Wow you must be an expert on this topic to feel so confident in this claim, care to share your credentials? Or evidence?
dboreham 5y ago
In Dr Who there were green dudes who lived underground on Earth, but they originally came from another planet.
- samplatt 5y ago
  The Silurians were from Earth, IIRC - in the deep past. The end product of the Mesozoic era - intelligent reptiles.
rsa4046 5y ago
Deep sea chemosynthetic communities, sustained by cycling and release of hydrothermal vent fluids on the seafloor (discovered in the 1970s), are quite unlike anything living at or close to ocean surface, where primary production is sustained by phytoplankton [0]. And bacteria have been found even in extremely deep boreholes [1]. Cold seep chemotrophy exists on the sea floor as well, fueled by reduced gases such as methane, other hydrocarbons (e.g. Gulf of Mexico). But in these seeps, the source of organic carbon may have ultimately come from the sea surface environment. [0] https://www.whoi.edu/know-your-ocean/ocean-topics/ocean-life/life-at-vents-seeps/ https://www.whoi.edu/know-your-ocean/ocean-topics/ocean-life... [1] https://www.mdpi.com/2075-1729/10/1/2/htm https://www.mdpi.com/2075-1729/10/1/2/htm

by Geee 5y ago

catlifeonmars 5y ago

By definition, they wouldn’t be aliens then, would they?

Geee 5y ago
Well, depends on how you define it. Another intelligent species which we call 'aliens'.
- antonvs 5y ago
  Some people call other humans "aliens." The US does that to help justify what is effectively indentured servitude for manual laborers.

echelon 5y ago

If there's another industrialized civilization on earth, we would have seen evidence of it.

Geee 5y ago
That's true. However, there wouldn't be much evidence if there's only a relatively small amount of them, or they're really good at hiding their activity. It's also possible that their civilization peaked millions of years ago and they are now mostly existing in some kind of post-biology state, which wouldn't show any signs to the surface.
BurningFrog 5y ago
On Earth, sure. Inside it, maybe not!
mustbeanexpert 5y ago
Wow you must be an expert on this topic to feel so confident in this claim, care to share your credentials? Or evidence?

dboreham 5y ago

In Dr Who there were green dudes who lived underground on Earth, but they originally came from another planet.

samplatt 5y ago
The Silurians were from Earth, IIRC - in the deep past. The end product of the Mesozoic era - intelligent reptiles.

rsa4046 5y ago

Deep sea chemosynthetic communities, sustained by cycling and release of hydrothermal vent fluids on the seafloor (discovered in the 1970s), are quite unlike anything living at or close to ocean surface, where primary production is sustained by phytoplankton [0]. And bacteria have been found even in extremely deep boreholes [1]. Cold seep chemotrophy exists on the sea floor as well, fueled by reduced gases such as methane, other hydrocarbons (e.g. Gulf of Mexico). But in these seeps, the source of organic carbon may have ultimately come from the sea surface environment. [0] https://www.whoi.edu/know-your-ocean/ocean-topics/ocean-life/life-at-vents-seeps/ https://www.whoi.edu/know-your-ocean/ocean-topics/ocean-life... [1] https://www.mdpi.com/2075-1729/10/1/2/htm https://www.mdpi.com/2075-1729/10/1/2/htm