QUOTE(Julian K. Spire @ Jul 25 2007, 04:03 PM)

The one-percent figure was from my Marine Biology Textbook. Oh, and even with the massive amount of probes etc. we have, we still haven't explored everywhere, now have we? And now I am going to release my theory; a theory I developed after reading well over thirty books about sharks, their habits, and the Meg in general.
1% is incorrect, I am sure it is currently about 4%.
Regardless, you are stating the Marianas Trench as the most likely hideout. That is mapped. It was fully surveyed in 1951 by the British naval vessel, "Challenger II" which gave its name to the deepest part of the trench, the "Challenger Deep". In 1960, the Trieste successfully reached the bottom of the trench, manned by a crew of two men.
QUOTE(Julian K. Spire @ Jul 25 2007, 04:03 PM)

The Megalodon, or C. Megalodon (although there is dispute over whether to classify it as Carcharodon Megalodon or Carcharias Megalodon) was a massive predator that existed roughly 1.1 million years ago according to the fossil record. The fossil record also indicates that the Megalodon vanished without a trace around this time period. The followig is my theory:
A predator the size of a Megalodon would have hunted whales; some Marine Biologists also speculate the Megalodon was cannibalistic. As the oceanic temperatures cooled, krill and other small creatures would have drifted deeper into the oceans; heading for areas near geothermal vents. Following the krill would be fish. Following the fish would be larer fish and so on. However, there is one creature that was mentioned in (I think it was the Trench) known as the Cronosaur (or Kronosaur). Massive, completely aquatic brown crocodile-like creatures that existed around the same time period as the Megalodon. These could have formed a staple in the Megalodon's diet. If the largest fish were heading down, and the Kronosaurs were following the fish, it would stand to reason that the Megalodons would follow the Kronosaurs (if they did, indeed hunt them.)
I addition to the information the Nena has provided outlining the different time periods - 100 million years is anough distance to assume the two never met, the Kronosaur (Aussie Dino YAY) has teeth up to 25 cms long and up to 12 meters long. Hardly shark prey for the 16M Meg.
The Orca provided formidable competition from about 5 million years ago. It is more likely the successful super predator won the ecological niche.
QUOTE(Julian K. Spire @ Jul 25 2007, 04:03 PM)

As the oceans continued to cool, a six-mile thick layer of cold water known as the thermocline formed. This would have effectively trapped the Megalodon (as well as the Kronosaur) in deep waters. I know sharks are not made for waters deeper than around three miles (some speculate five), but we have not had the fortune of studying a Megalodon that has been perfectly preserved; internal organs of the shark (while hypothesized to be similar in structure to C. Carcharias, or the Great White Shark) are still shrouded in mystery. It has been suggested by more than one cryptozoologist that the Megalodon developed adaptations for living in deep water; such as bioluminesence and the like. This would explain the 'ghostly white color'.
The thermocline (sometimes metalimnion) is a layer within a body of water or air where the temperature changes rapidly with depth.
Evolution takes a great deal longer than that. You can't "develop" bioluminacence overnight. By the time this change took place, the Meg would be extinct.
Your theory can't work, because you are changing Megalodon's nature. It is like the Great White, a fast moving killing machine, not a deep ocean passive dweller. You can't just re-write a creatures nature of existance to suit a theory.
QUOTE(Julian K. Spire @ Jul 25 2007, 04:03 PM)

To explain the apparent misconception in size is a different story. One cryptozoologist, Stan Freidman, suggested that as the Meg continued to live in the trenches and deep waters, (if it did, indeed, do so) its body became compact. If it ever found its way to the surface due to a warmer area of ocean, the body would likely expand. If there was a blubbery layer thick enough, this would not prove fatal. Stan has expressed his views as his own belief, and has also stated that this has NOT been proven or tested. This concludes my statement on one plausible way the Megalodon could have survived.
-JKS
Giant Suid don't expand. Neither do Sperm Whales.
Stan Friedman is turning his hand at zoology now? When did he give up on Nuclear Physics?
Maybe he ought to stick with Roswell.