A power outage early in the second half on Sunday stopped America's biggest sporting event for more than half an hour and threatened to rob the Ravens of their momentum that had seen them establish a 22-point lead.
After the interruption, the 49ers stormed back, cutting the deficit to just two points but Baltimore hung on as San Francisco came so close to the go-ahead score.
The 49ers had first-and-goal in their final drive, trailing by five points, but quarterback Colin Kaepernick could not connect with a receiver.
The Ravens gave away a safety to run down the clock, making it 34-31 and while San Francisco had one last chance on the subsequent kick-off return, but the runner was quickly swallowed up by Ravens tacklers, ending the game as the Baltimore players and staff poured onto the field in celebration.
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