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Theodore Holden

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An rigorous case can be made for the proposition that modern humans cannot be native to this planet.

Hominid eye sockets and nasal areas were much larger than those of modern humans. The huge eyes of hominids and dinosaurs and even a few leftover creatures like lemurs and tarsiers, were adaptations to a very dark sort of a world. In the case of dinosaurs, the large eyes pertained in carnivores and herbivores alike

Humans by way of contrast have the smallest relative eye size of advanced creatures.

If you want to believe that humans evolved from hominids on this planet, you need to believe that some hominid/human-wannabee:

Lost his fur coat while ice ages were going on.
Lost 99% of his sense of smell while trying to make it as a land prey animal
Lost almost all of his night vision at a time when night was the only time of day to be had.

You say that doesn't sound like a formula for success?

If, on the other hand, you prefer to believe that God created modern man fully formed on this world, then there is a question as to whether God would create a creature on a world for which the creature was spectacularly ill-adapted. There's nothing in the Bible about God being stupid....

There actually is a reasonable thesis to be had for human origins, but it does not involve this planet.

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    Sep 9 2013: Mr. Holden, please fill-in the blank: Homo Sapiens originated in our Solar System on a mysterious planet called ________________.
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      Sep 9 2013: Ganymede. Nothing terribly mysterious about it.

      Cosmos in Collision is not an anti-evolution tract per-se, but it contains what is likely the biggest argument against evolution which has ever come down the road. The book demonstrates that our solar system was originally in two parts: a part consisting of our sun, Jupiter, Mercury, and possibly whatever the asteroid used to be; and a part consisting of Saturn, Neptune, Mars, Earth, and probably Uranus.

      Both sides of the thing had living systems based on the same DNA/RNA information scheme, and involving complex quadruped creatures based on that scheme. If you want to believe all of that evolved, you need to believe it all evolved almost exactly the same way, twice....
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        Sep 9 2013: Oh, yeah, is that the Ganymede discovered by Galilei which orbits Jupiter? So even though all known Homo Sapiens live on Earth you say they originated there? Since the idea stands in opposition to the entire body of scientific and Biblical evidence how is that you say it is not terribly mysterious? Should I get my tinfoil hat from the shelf?
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          Sep 9 2013: It may really be that the format of TED is not adequate for discussing this one... TED strikes me as interesting for several reasons but it doesn't have forum/BBCODE capabilities and the 2K-byte limit is clunky.

          Again humans have the smallest relative eye size of advanced creatures and are adapted to a bright world. The Earth in past ages was a very dark world, hence the huge eyes of hominids and dinosaurs and other ancient creatures. The combination of lack of fur, lack of a decent sense of smell, and lack of the kinds of eyes needed for Earth in ancient times rule this planet out as an original human home world.
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          Sep 9 2013: Minus the other gas giants, Jupiter would have been in a much closer orbit in ancient times, and Ganymede would have been a very bright, warm, wet, and safe sort of a world.

          I've mentioned this here before... Schools teach that planets form up from swirling masses of solar material. That being true, you'd expect the spin axes of the planets in our own system to all be roughly perpendicular to the plane of the system. Our sun, Jupiter, and Mercury in fact do look like that, but the others don't.

          http://simple.wikipedia.org/wiki/Axial_tilt

          Sun 7.25 (to the Ecliptic)
          Mercury ~0.01
          Venus 177.4
          Earth 23.439281
          Moon 1.5424
          Mars 25.19
          Ceres ~4
          Jupiter 3.13
          Saturn 26.73
          Uranus 97.77
          Neptune 28.32
          Pluto 119.61

          The explanation which the data suggests is as follows:

          Our sun, Jupiter, and Mercury with their near zero axis tilts, amount to an original system.

          Uranus and Venus are special cases with their own separate stories.

          Mars, Earth, Neptune, and Saturn with their roughly 26-degree axis tilts must have comprised a separate small system which was captured by our sun as a group. This would result from flying into the plane of the sun's system in the form of a Herbig/Haro string at a 26-degree angle from the South. Those planets kept the ~26-degree tilt as they began to orbit as they do now.
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          Sep 9 2013: Saturn would have been a brown dwarf star and planets (Earth/Mars) orbiting a dwarf star typically do so inside the heliosphere of the dwarf star. Radiant energy would bounce back from that heliosphere to all points of the planet so that you wouldn't freeze, but you'd be living in a deep, dark purple sort of a world, ideal for hominids but not for humans.

          Again a sense of smell is crucial for land animals, particularly prey animals, but not for aquatic mammals. Elaine Morgan's "Aquatic Ape" thesis is the best theory ever yet put forward for human adaptation. Morgan describes a fairly long list of traits which we share with the aquatic mammals, and which are rare or non-existent amongst land animals. It's never gotten any traction in academia for two reasons, there is no fossil evidence of such a development, and there's never been a body of water on this planet which would be safe for humans to live in. Wonderful theory, all it really needs is another planet to happen on...

          A view from Ganymede, some tens of thousands of years ago:
          http://i141.photobucket.com/albums/r53/icebear46/image059_zps10faf866.png

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