Baby It's Cold Outside (Already)!

Today marked the inaugural double-layer pants kickoff of Fall/Winter 2009.

In honor of this, I decided to celebrate a new roofing innovation that was just invented by a few brainiacs at MIT.  Designed for a materials engineering contest, a group called Thermeleon created a solution that reacts to heat and encapsulated it in a tile.  Long story short, black roof tiles in the winter turn white in the summer or when its sunny.. respectively absorbing or reflecting heat.  Read the details here. Way to be green, neat, and save money.
In other news, I'm looking for ways to retain heat in my home.  With a large south facing window, it is pretty warm during the day (now that the drafts are sealed).  And generally a portion of the heat stays throughout, judging by the temperature difference in my apt and the hallway.  But how to keep the heat longer than the day?  This one I'll have to research more.