
“It’s a well defined spot in time — it’s a big historical event,” says Jan Zalasiewicz, a stratigrapher at the University of Leicester, UK, and lead author of the paper published this week1.
Zalasiewicz did the study with 25 other members of a working group that is exploring whether and how to formally define the Anthropocene. In their paper, the researchers propose that the boundary should be defined by the first A-bomb test in 1945 and the stratigraphic presence of radioactive elements from that blast and the much larger nuclear ones that took place over the next decade.
First atomic blast proposed as start of Anthropocene
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