How cold is it? Well, it was so cold that Pittsburgh's National Aviary had to keep its penguins indoors this week.

Ok, ok, the penguins are African penguins, and they prefer warmer temps, the National Aviary reported on Facebook. But TribLive says the whole crew had to stay inside, despite an outdoor habitat with warm water, warm rocks, and heaters overhead. "It's the sustained cold temperatures, especially below zero, that worry us," said Chris Gaus, senior aviculturist. But it was Estcourt Station, Maine, that took the prize for coldest corner of America—Reuters says yesterday temps dipped to minus 38 degrees F. No thanks!

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Nor was the cold limited to the Northeast. In D.C., train rails got so cold they cracked, says Reuters. I can report that practically everyone in Georgia was posting photos of frozen fountains on Facebook. Here's an AP photo from Atlanta:

And here's what the plants around a fountain outside Jackson, Mississippi's town hall looked like:

Winter misery in its purest form.

But Ja Rule sees the upside:

Images via National Aviary's Facebook and AP.