Ye gods! Talk about the Big Chill. As anyone who lives on the east coast or mid-west knows all too well, we've had a run of bitterly cold sub-zero days the past week. All one can do is hunker down under multiple layers and wait for the Big Thaw. It's so cold, even the internet feels freezingly slow! Watch the LiveScience video below to see the daily progress of the arctic air as it plunges a good chunk of the country under its wintry mantle.