Don's reservations about Mike's statement #2 are well founded. Air (still
air) is by far a poorer conductor of heat than is water.
"When heat is transferred by conduction alone, the difference in temperature
between the organism and its surroundings is inversely proportional to the
conductivity of the fluid. As a result, organisms in water maintain a
temperature about twenty-three times closer to that of their environment than
do organisms in air." -- Mark Denny. 1993. Air and Water. p 158
Sherman Suter
echino at uchicago.edu
but really at Paleobiology NHB-121 Smithsonian Institution W DC 20560