Proceedings of the National Academy of Sciences, Volume 122, Issue 49, December 2025. SignificanceMathematical models are widely used to study the spread of infectious diseases. A central question is whether these models predict that disease incidence will oscillate indefinitely, settle down to a constant level, or behave unpredictably …
Observations from the Little Bunker
Last updated: December 10, 2025 10:11 PM
Atmospheric CO₂
427.2 ppm
+17.6
ppm/year
Atmospheric CH₄
1930.95 ppb
+-3.5
ppb/year
Global Temperature
+1.48 °C
Peak: +1.73°C
World Population
8.1 billion
+67
million/year