 Well, believe it. A new study out this week says the melting of polar ice caps due to climate change is slowing the rotation of the planet. The study also says if we continue with this trajectory, by the year 2100, days could be 2.2 milliseconds longer than they are now. Not a big deal for us, but a very big deal for space travel, where even a tiny deviation in calculations can cause huge navigational mistakes. Sherry Preston, ABC News.