Just learned that I work less than a mile from the longest-running stone weathering experiment: NIST's stone wall test.
Built in 1948, it includes 2352 samples of stone from 47 US states and 16 countries, and uses two types of mortar.
A century ago Edward Forbush sent a survey around to his network of informants asking them to share curious behaviors they'd seen among birds, here are some highlights.
(collected by E. B. White in the New Yorker, 1966)