originally posted by Annette
Really it is not a heartbeat, only the seasonal changes, but thought some might like to see it.
http://au.news.yahoo.com/thewest/a/-/breaking/18276118/animation-shows-earths-he artbeat/
originally posted by Clansman
Pretty cool, but it never shows any Arctic Sea ice, which I find puzzling. Perhaps it is cropped out of the pictures to improve the contrast and create the "heartbeat" effect.