re: #847 hopperandadropper

The polar ice caps on Mars have also been shrinking, which has been well documented by NASA for several years. The most likely explanation for this is variability in solar output. Are you two seriously arguing that solar output is invariable?

No. The fact, not the argument, is that variations in output do not match the recent trends in either Earth or Mars climate. The observed changes in Mars climate are explained here.

realclimate.org