Молекулярные часы

Conway Morris, S. Моlесulаr clocks: defusing the Cambrian explosion? Current Biology 7: R71 — R74; 1997.

Bromham, L., Rambaut, А., Fortey R., Cooper, А. and Penny, D. Testing the Cambrian explosion hypothesis by using а molecular dating technique. Proceedings of the National Academy of Sciences USA 95: 612386 — 612389; 1998.

Ayala, J., Rzhetsky, А. and Ayala, F. J. Origin of metazoan phyla: molecular clocks confirm paleontological estimates. Proceedings of the National Academy of Sciences USA 95:606 — 611; 1998.

«Земля-снежок»

Hoffman, Р. F., Kaufman, А. J., Halverson, С. Р. and Schrag, D. Р. А Neoproterozoic snowball Earth. Science 281: 1342 — 1346;1998.

Hoffman, P. F. and Schrag, D. Р. Snowball Earth. Scientific American Jаnuаrу 2000.

Walker, G. Snowball Earth. New Scientist 6th November 1999.