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Glacier retreat in Greenland not only changes the primary productivity of downstream fjord ecosystems but also the ecosystem structure and functioning, according to seasonal sampling of two downstream fjords.
Analysis of changes in the Earth’s rotation in the Precambrian suggests that day length stabilized at 19 h for 1 billion years due to tidal resonance, which may have been linked to a relatively quiescent period of tectonic activity and biological evolution.
