QUESTION: Canadians are all too familiar with the concept of a "Wind Chill Factor" the - fact that the wind makes it feel colder than it actually is by increasing the rate of heat transfer. Keeping this principal in mind, a lower atmospheric pressure will also effect the rate of heat transfer. In the same way that 4 C water feels colder than 4 C air due to the different heat transfer characteristics of the two media, a -20 C temperature on Mars would not feel as cold as -20 C air on Earth. What, then, would a student feel the temperature to be if they were on Mars with the Pathfinder? It might be more relevant to many people to see the values shown on the website correlated to more human terms, much as we do in Canada with the "Wind Chill Factor". ANSWER from Bruce Jakosky on October 24, 1997: If a student were exposed to the Martian air so that they could feel the "wind chill", they would have more serious problems to contend with. The pressure is low enough that their lungs would pop. Bodily fluids would boil, and they would lose consciousness and die very quickly. Seriously, I'm not sure that the wind chill factor has much intuitive meaning at the low temperatures that are appropriate most of the time on Mars. A typical day on Mars would be very close in average temperature to the coldest day in Antarctica.