Instant Index: Titanic Violin Authenticated; Missing Iditarod Dog Found

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.

Presidential Celebration After Louisville's win Thursday night against Villanova in the Big East tournament, the team was congratulated by former President Clinton. Judging by the Instagram photos, the players were more than a little excited to meet Bubba.

Image credit: Courtesy Chane Behanan

Image credit: Courtesy Chane Behanan

Image credit: Courtesy of Tom Jurich

Titanic's Last Song Forensics tests have determined that a violin found in a British man's attic is the one that was used by the bandmaster of the Titanic to play, according to lore, "Nearer My God to Thee" during the ship's last moments.

Image credit: Henry Aldridge and Son