Each team had to create a design that could keep the inside of the house at a temperature of between twenty-two and twenty-four degrees Celsius.
VOA: special.2009.10.27
The research team's temperature analysis showed that summer temperatures in the Arctic, in step with the reduced energy from the Sun (related to an approximately 21, 000-year cyclical wobble in Earth's tilt relative to the Sun), cooled at an average rate of about 0.2 degrees Celsius per thousand years.