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."

Dad Develops 'Bionic Pancreas'

A bionic pancreas from researchers at Mass General and Boston University uses a sensor, just under the skin, to monitor blood sugar levels. An app on your phone calculates the right amount of insulin and automatically releases it into your bloodstream. It could be a gamechanger for those with Type 1 diabetes but it's experimental for now.

Watch Kidman and Urban Sing

Keith Urban and wife Nicole Kidman visited a children's hospital Friday in Clayton, Australia, and gave an impromptu concert to lift everyone's spirits.

Urban and his wife sang "Amazing Grace" at the Monash Children's Hospital. The two looked completely at home, supporting a good cause. Watch here.