Over the last 10,000 years, snow and rain dripped into the depths of Scărișoara, where they froze into thin layers of ice containing chemical evidence of past winter temperature changes. (sciencedaily.com)
Mountains of new ice underneath the ice sheet Researchers have also observed water in lakes underneath glaciers that refreezes into thin layers of ice. (scientificamerican.com)
Advocates of embryo - destructive research and related practices, in particular, are treading on a very thin layer of ice that could easily crack beneath them if some new development underscores the ethical questions surrounding such research, rather than the potential for medical progress alone. (thenewatlantis.com)