This paper ( http://arxiv.org/pdf/1007.0437v1.pdf http://arxiv.org/pdf/1007.0437v1.pdf ) estimates 11 million years into a 27 million year cycle. So a typical

This paper ( http://arxiv.org/pdf/1007.0437v1.pdf http://arxiv.org/pdf/1007.0437v1.pdf ) estimates 11 million years into a 27 million year cycle. So a typical mid-point position (yey!).