Proceedings of the National Academy of Sciences, Volume 122, Issue 51, December 2025. SignificanceThe middle ear of modern mammals is detached from the mandible and has a soft-tissue eardrum, which allows airborne sound to be heard across a wide range of frequencies. A rich fossil record shows that the middle ear bones of mammals evolved …
Observations from the Little Bunker
Last updated: December 25, 2025 02:10 PM
Atmospheric CO₂
427.2 ppm
+17.9
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