Proceedings of the National Academy of Sciences, Volume 123, Issue 1, January 2026. SignificanceWhy did monogamy replace polygyny in many of the world’s most unequal societies? One theory holds that monogamy reduces reproductive inequality, fosters cooperation, and is selected for at the group level. Another, rooted in individual-level …
Observations from the Little Bunker
Last updated: January 09, 2026 04:30 AM
Atmospheric CO₂
428.3 ppm
+17.4
ppm/year
Atmospheric CH₄
1940.59 ppb
+-0.24
ppb/year
Global Temperature
+1.48 °C
Peak: +1.73°C
World Population
8.1 billion
+67
million/year