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:

News Chopper John Silva, the engineer who added a camera to a helicopter in 1958 and changed the future of television news, died last week at the age of 92. In an interview with the Archive of American Television in 2002 he explained how he'd come up with the idea. "How can we beat the competition? Why, of course. If we could build a news mobile unit in a helicopter we could get over it all, get there first, avoid the traffic, and get to all the stories before anybody…. It'd be a wonderful thing," he said.

Last Man on the Moon Forty years ago today, Eugene Cernan set foot on the moon as part of the Apollo 17 mission and since he left no man has gone back. Cernan said the experience was like "sitting on God's front porch."

Image credit: NASA