Did the Anthropocene begin with the nuclear age?ScienceDaily (Jan. 15, 2015)—Humans are having such a marked impact on the Earth that they are changing its geology, creating new and distinctive strata that will persist far into the future. This is the idea behind the Anthropocene, a new epoch in Earth history. But if the Anthropocene is to be a geological epoch -- when should it begin? Scientists have now identified July 16, 1945 as key time boundary in Earth history.
When Earth was a frozen snowball:BBCNews (Jan. 12, 2015)—715 million years ago the entire planet was encased in snow and ice. This frozen wasteland may have been the birthplace of complex animals.