Are cosmic rays behind global warming?

A front page article from the Ottawa Citizen today about a University Of Ottawa Professor who believes that cosmic rays cause global warming.

A prominent University of Ottawa science professor says what we know about global warming is wrong -- that stars, not greenhouse gases, are changing Earth's climate.

Jan Veizer says high-energy rays from distant parts of space are smashing into our atmosphere in ways that make our planet go through warm and cool cycles.

The recently retired professor (he still holds a research chair and supervises grad students and postdoctoral fellows) knows that to challenge the accepted climate change theory can lead to a nasty fight.

It's a politically and economically loaded topic, and as polarized as an election campaign.

Yet he is speaking out -- a bit nervously -- about his published research.

"Look, maybe I'm wrong," he said in an interview. "But I'm saying, at least let's look at this and discuss it.

"Every" part of the theory "has its problems," Mr. Veizer adds. "But so does every other model" of how Earth's climate behaves.