Now this is interesting:

Nof used records of the Mediterranean Sea’s surface temperatures and statistical models to examine the dynamics of the Sea of Galilee, which Israelis know now as Lake Kinneret.

The study found that a period of cooler temperatures in the area between 1,500 and 2,600 years ago could have included the decades in which Jesus lived.

A drop in temperature below freezing could have caused ice — thick enough to support a human — to form on the surface of the freshwater lake near the western shore, Nof said. It might have been nearly impossible for distant observers to see a piece of floating ice surrounded by water

I don’t know if it takes a genius, or a study to come to that conclusion, but there you go. You can read the whole story here:
CNN.com – Study claims ice, not water, kept Jesus afloat – Apr 4, 2006