Euan Mearns, geologist: He takes a close look at the data on temperatures, carbon dioxide (CO2), and methane (CH4) found in the Vostok Ice Core of Antarctica. He focuses on the Eemian warm period between 130,000 and 115,000 years ago. This warm period was the last warm period before the current warm period, the Holocene. In her 2008 graphs showing the relationship between CO2 and temperatures from the Vostok Ice Core covering the entire record, Jo Nova stated the average lag was about 800 years, with temperatures rising (falling) about 800 years before CO2 rising (falling). This lag indicates that CO2 could not be the cause of rise or fall of temperatures.
Freeman Dyson, May, 2016 - I watched Mercury transiting the Sun. The striking fact was not the little black image of Mercury but the total absence of sunspots. I have seen many transits before this one, but never without sunspots. It seems the sun has gone to sleep as it did in the Maunder Minimum in the seventeenth century. In the seventeenth century we had the Little Ice Age and now we have the pause in global warming. Evidence getting stronger that the Sun is a big player in the climate story.
Gerald Marsh - Contrary to the conventional wisdom of the day, the real danger facing humanity is not global warming, but more likely the coming of a new Ice Age.