The sun has had a major flareup, and a coronal ejection is headed Earth's way. Auroras should be spectacular on Saturday.
There's a cool video of it here: http://www.youtube.com/watch?v=tqNzpg7vF1o&feature=player_embedded

Gold is $1,581/oz today. When it hits $2,000, it will be up 26.5%. Let's see how long that takes. - De 3/11/2013 - ANSWER: 7 Years, 5 Months