User blog comment:David Rain/ATL idea. Odd, but Cool./@comment-3967693-20120609153144/@comment-32656-20120610124539

However, that is more than balanced out by the periods where the earth turned into snow and ice. Not just parts, but pretty much all of it, with tiny gaps at the equator. The Icehouse would kill pretty much all life if water acted like this.

Basically, all life ends in this form with this change as you describe here, as the seasonal changes (what little that is) leave the net result of ice staying.

Remember, as it builds up, it would be increasingly hard to get rid of.