Plants that were frozen during the "Little Ice Age" centuries ago have come back from the dead. Samples of 400-year-old plants known as bryophytes have flourished under laboratory conditions.
Dr La Farge told BBC News, "When we looked at them in detail and brought them to the lab, I could see some of the stems actually had new growth of green lateral branches, and that said to me that these guys are regenerating in the field, and that blew my mind."
The findings appear in Proceedings of the National Academy of Sciences.
They come from a group at the University of Alberta, who were exploring an area around the Teardrop Glacier, high in the Canadian Arctic.