Medieval Warming Period or Epic Data Bias?

Climate change skeptics love to talk about a supposedly ignored ‘medieval warming’ period.  The medieval warming period, they claim, proves that the planet has seen hotter and survived, even bloomed (see an example here). The IPCC, they claim, has manipulated the data to make it look like the medieval warming period didn’t happen.

But that story only contains half the facts – and even less than half the data. Here’s Peter Sinclair, with the full story.  

Sounds more like medieval thinking than medieval warming to me.