Bok
07-10-2013, 04:54 PM
Cyclic changes in day length overlie decades-long trends
More... (http://www.sciencenews.org/view/generic/id/351473/title/Every_six_years_Earth_spins_slightly_faster_and_then_slower)
More... (http://www.sciencenews.org/view/generic/id/351473/title/Every_six_years_Earth_spins_slightly_faster_and_then_slower)