Feral dogs, out in the cold, marking our dissent, one rosebush at a time.
From 50 to 25 CPS within roughly 35 minutes, you've probably got a nice sample of Radon gas which have Beta-decayed to Lead-214 (Half-Life of 26.8 ') and Bismuth-214 (Half-Life of 19.8')probably mixed up with some Alpha-decay directly from Radon-222 (H/L = 3 d)
Would this rain be putting hot particles (like cesium) in the air?
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