Have superheavy elements been produced in nature? I. Petermann, K. Langanke, G. Martínez-Pinedo, I. V. Panov, P. -G. Reinhard and F. -K. Thielemann Eur. Phys. J. A, 48 9 (2012) 122 Published online: 20 September 2012 DOI: 10.1140/epja/i2012-12122-6