Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Ratio of surface-level skin cancer in humans (de Gruijl and Van der Leun, 1994) in the 300 yr SN case compared to control run, as a function of time, at latitudes between 5° and 55° north. (Note that “SCUP” stands for “Skin Cancer Utrecht-Philadelphia.”) Time 0 indicates an arbitrary reference time after steady state is achieved and is the same start time as in Fig. 3.
