But how do we actually know, and how much do we actually know, about historic and prehistoric temperatures? In this Climate Discussion Nexus "Backgrounder" video John Robson examines the uses, and abuses, of various temperature proxies.
There is one feature I notice that is generally missing in cargo cult science [pseudoscience]…It's a kind of scientific integrity, a principle of scientific thought that corresponds to a kind of utter honesty a kind of leaning over backwards.