Instant Index: Snowmobilers Outrun Wyoming Avalanche

Diane Sawyer with the top stories that have people buzzing this week.
3:00 | 01/18/13

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Transcript for Instant Index: Snowmobilers Outrun Wyoming Avalanche
At the top of our instant index tonight, did you see this video online today? Watch. A mountain in wyoming, a lone man in a snowmobile, but then the snow gives way. His friends film, shout and watch. You can hear the rumble of the snow. Impossibly, he outruns the danger. But watch again, this time it's his perspective, a mel met cam captured the snow kicking up all around him. This white knuckle moment happened a year ago. Tonight he is just fine. And something else you have to see, what's being called the moon-a-lisa. Nasa practiced using a hi-tech laser by beaming that famous painting 240,000 miles away, to the moon. Or at least to a satellite orbiting the moon. Scientists say it could mark the beginning of a whole new way of communication, which means somewhere tonight, aliens are asking, what is that woman thinking? And the super bowl just got another big jolt of star power. And here's why? ♪ This girl is on fire ♪ ♪ this girl is on fire ♪ you know the girl we mean. Alisa keys will sing the national anthem at the big game. It's the third time she's performed at a super bowl and that is a new record for any performer.

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