Ice cap over Europe:
<img src='http://www.gsi.ie/NR/rdonlyres/33EE5A20-415D-4FEB-8443-120AA879B397/0/16IceAge.jpg' border='0' alt='user posted image' />
Post-glacially, R enters from South Asia. N from Eastern Siberia.
<img src='http://www.gsi.ie/NR/rdonlyres/33EE5A20-415D-4FEB-8443-120AA879B397/0/16IceAge.jpg' border='0' alt='user posted image' />
Post-glacially, R enters from South Asia. N from Eastern Siberia.