Climate: How unusual is today's solar activity?

@article{Muscheler2005ClimateHU,
  title={Climate: How unusual is today's solar activity?},
  author={Raimund Muscheler and Fortunat Joos and Simon A. M{\"u}ller and Ian Snowball},
  journal={Nature},
  year={2005},
  volume={436},
  pages={E3-E4}
}
Arising from: S. K. Solanki, I. G. Usoskin, B. Kromer, M. Schüssler & J. Beer 431, 1084–1087 (2004); Solanki et al. reply.To put global warming into context requires knowledge about past changes in solar activity and the role of the Sun in climate change. Solanki et al. propose that solar activity during recent decades was exceptionally high compared with that over the preceding 8,000 years. However, our extended analysis of the radiocarbon record reveals several periods during past centuries… 
Climate: How unusual is today's solar activity? (reply)
Muscheler et al. claim that the solar activity affecting cosmic rays was much higher in the past than we deduced from 14C measurements. However, this claim is based on a problematic normalization and
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