Scrub jays have been researched and have been found to have different traits when encountering different `placed' objects - including dead jays. Real interesting read and theories about what was observed to have happened. Another find science post on TAL - dig into the archive for more. Bird Funerals (a BBC link).
Here's another of the strange Sky Noise Phenomena of 2012 - This video just two weeks old.
Edgy Science - Plate Tectonics on Mars?
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15 Mind Stimulating Essays Previously Found On The Heavy Stuff