Documents reveal federal researchers, whose work is financed by taxpayers, need approval from Ottawa before speaking with media.
The Harper government has tightened the muzzle on federal scientists, going so far as to control when and what they can say about floods at the end of the last ice age.
Natural Resources Canada (NRC) scientists were told this spring they need "pre-approval" from Minister Christian Paradis' office to speak with journalists. Their "media lines" also need ministerial approval, say documents obtained by Postmedia News through access-to-information legislation.
The documents say the "new" rules went into force in March and reveal how they apply to not only to contentious issues including the oilsands, but benign subjects such as floods that occurred 13,000 years ago.