While examining an exposed area of land, La Farge and her team discovered a small area of moss called Aulacomnium turgidum. It is a type of bryophyte (苔藓类植物) plant that mainly grows across Canada, the U．S. and the highlands of the U．K.

　　Dr. La Farge noticed that the moss had small patches of green stems, suggesting it is either growing again or can be encouraged to repopulate. Dr. La Farge told the BBC, “When we looked at the samples in detail and brought them to the lab, I could see some of the stems actually had new growth of green branches, suggesting that these plants were growing again, and that blew_my_mind. When we think of thick areas of ice covering the landscape, we've always thought that plants have to come from refugia (濒绝生物保护区), never considering that land plants come from underneath a glacier. It's a whole world of what's coming out from underneath the glacier that really needs to be studied. The ice is disappearing pretty fast. We really have not examined all the biological systems that exist in the world; we don't know it all.”

　　Dr. La Farge took samples of the moss and, using carbon­dating techniques, discovered that the plants date back to the Little Ice Age. Dr. La Farge's team took the samples, planted them in dishes full of nutrient­rich potting soil and fed them with water.

　　The samples were from four separate species including Aulacomnium turgidum, Distichium capillaceum, Encalypta procera and Syntrichia ruralis. The moss plants found by Dr. La Farge are types of bryophytes. Bryophytes can survive long winters and regrow when the weather gets warmer.

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