Due to the significant proportion of nickel, the heat of the high - temperature earth core can not flow towards the planet's surface by means of the motion of the electrons alone. (sciencedaily.com)
In some of the e-mail messages, Dr. Mann refers to his assembly of data from a number of different sources, including ancient tree rings and earth core samples, as a «trick.» (sciencemag.org)
That ice core analysis (as shown by Al Gore in his movie) shows that for hundreds of thousands of years, CO2 and temperatures have moved together, demonstrating that CO2 is the main thermostat of the Earth (climate-skeptic.com)