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.

Whale Shark Rescue

This video was shot underwater in the Pacific Ocean, 250 miles off the shores of Mexico. Divers found this giant whale shark tangled up in a 2-inch thick rope. It was cutting deeply into the shark's flesh, and must have been there for quite a while, because it actually had barnacles growing on it.

Number: 816 million

A record-breaking number: 816 million. South Korean rapper Psy's "Gangnam Style" has surpassed Justin Bieber's "Baby" as the most-watched video of all time on you-tube. Bieber's video has been on the site for more than two and a half years. Psy's was just uploaded four months ago.

Michael Tran/FilmMagic/Getty Images

Rolling Stones Celebrate 50th Anniversary

The Rolling Stones coming full circle tonight, playing to a sold-out concert in London, celebrating 50 years since they first took stage at the city's marquee club in July1962. Joining the Stones tonight are former band members Bill Wyman and Mick Taylor, as well as special guests Mary J Blige and guitarist Jeff Beck.

Charles Sykes/Invision/AP Photo