Canadian lake could mark the start of new geological epoch

Plutonium from nuclear weapons, industrial waste, and human
activity more broadly have left such a mark on the Earth that a new
epoch called the Anthropocene has been proposed. Scientists are
debating the specific geological site to define this epoch, with
the frontrunner being an unassuming lake in Canada: Crawford Lake.
What is it about this spot that holds the secrets to this period of
history? From hydrogen bombs to hens’ bones, how do we define the
Anthropocene, the beginning of the human era on Earth? Ian Sample
asks Damian Carrington. Help support our independent journalism at
theguardian.com/sciencepod