From the unconventional and awe-inspiring to the hilarious and heartwarming, here's a look at some of the most interesting photos, videos and stories that have our newsroom talking today. What's capturing your attention, filling your inbox and cluttering your Facebook/Twitter feed? Tweet us the stories you're talking about using #InstantIndex or email us at ABC.WorldNews@abc.com and they could appear on World News.

Tonight's Instant Index:

FLOTUS Bday It was a busy day for first lady Michelle Obama. She turned 49, launched the @FLOTUS Twitter account and debuted a new hairstyle.

Image credit: @FLOTUS/Twitter

Gold Nugget A man in Australia who was trolling the beach with a metal detector discovered a gold nugget weighing more than 11 pounds. The nugget is estimated to be worth more than $300,000.

In video posted to Youtube by TroyAurum, a 177-ounce gold nugget was found near Ballarat, Victoria, Australia, Jan. 16, 2013