Tying celestial mechanics to Earth’s ice ages

From Physics Today Gradual falls and sharp rises in temperature for millions of years have profoundly affected living conditions on the planet and, consequently, our own evolution. Mark Maslin is…

Submarines in the Winter Twilight

One of the more celebrated North Pole surfacings of the USS Skate happened today in 1959, see http://wattsupwiththat.com/2009/04/26/ice-at-the-north-pole-in-1958-not-so-thick/ for more on that and several others. Nearly a couple years ago…