If the sun, moon, and planets have an impact on the earth’s temperature, one would hope that climate scientists would factor that impact into their projections of future global warming. But scientist Nicola Scafetta of Duke University says climate models routinely ignore natural cycles tied to the sun and planetary bodies — thus leading to inaccurate predictions of large-scale warming.

Scafetta discussed his research into the topic during a presentation for the John Locke Foundation’s Shaftesbury Society. You can download a PDF of his presentation slides here. In the video clip below, Scafetta explains why some scientists ignore such important information.

2:30 p.m. update: Click play below to watch the full 1:03:45 event.

You’ll find other John Locke Foundation video presentations here.