Cryptic era

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1	2. There & Back Again by Ucaoimhu A six-person trip to Canada before 2002, in the pre-cellphone era, ran into some issues: Alice was left behind, Bill was turned back at the border, Carla was confused when switching side Add to Reading List Source URL: www.math.uchicago.edu Language: English - Date: 2015-07-13 00:19:34 Crosswords Cryptic crossword Wordplay
2	Excerpted from CREATION: How Science Is Reinventing Life Itself. Published by Current/ Penguin. Copyright Adam Rutherford, 2013. Chapter 3 Hell on Earth Add to Reading List Source URL: ncse.com Language: English - Date: 2013-06-10 14:02:52 Geological history of Earth Hadean Earth Late Heavy Bombardment Jack Hills Origin of water on Earth Cryptic era Early Earth Archean Historical geology Geology Geologic time scale