"Once Earth amassed an ocean 4.3 billion years ago it should have quickly frozen over and reflected so much sunlight back into space that it squelched Earth's ability to thaw out for billions of years.
"The dilemma, called the "faint young sun paradox," has been know about since the 1950s and was popularized by Carl Sagan. Geochemists and solar physicists have wrestled for answers all these years.
"Lowering Earth's reflectivity by reducing cloud cover doesn't work. Models also show that a greenhouse effect from dense carbon dioxide and methane can't warm the Earth enough either. In some simulations, methane and carbon dioxide combine to make a photochemical smog that would have chilled Earth even further.
"Now, David Minton of Purdue University has come up with a novel solution that, by his own admission, straddles science fact and fiction. Minton proposes that Earth was closer to the sun when it formed and then migrated outward to its current orbit. To keep Earth tepid under a cooler sun, our planet would have needed to have been roughly 6 million miles (9.7 million kilometers) closer to the sun than it is today.
OK, now the really hard part...
"The challenge is that this effect would have had to have dragged out over one or two billion years. Even more problematic is that for this musical chairs game to work at all, one more terrestrial planet is need in the inner solar system. And, it's a big one at that, ranging between the mass of Mars and Venus.
"The unlucky "odd planet out" would have wound up falling into the sun, being ejected from the solar system, or crashing into another terrestrial planet.
|Dr. David Minton.|
Wow, isn't it amazing what scientists come up with these days! The only problem is, there is no experiment they can conduct to test this idea ... so this is not "Science".
When will scientists admit that there is no purely "natural" answer to the universe? All things point to a Creator, just as the Bible tells us to look for.
(excerpts from Ray Villard, Was Earth a Migratory Planet? Discovery News, April 18, 2012)