Proceedings of the National Academy of Sciences, Volume 122, Issue 27, July 2025. SignificanceA ubiquitous feature of social networks is that friends of friends tend to also be friends with each other. But there is surprisingly little evidence that having a mutual connection actuallycausesan increase in the likelihood of forming …
Observations from the Little Bunker
Last updated: August 18, 2025 06:15 PM
Atmospheric CO₂
425.4 ppm
+18.4
ppm/year
Atmospheric CH₄
1934.91 ppb
+9.11
ppb/year
Global Temperature
+1.48 °C
Peak: +1.73°C
World Population
8.1 billion
+67
million/year