Shane Carwin vs. Brock Lesnar

Shane Carwin is bright enough to handle the demands of a full-time job as a civil and mechanical engineer in northern Colorado. Maybe then, he'd be so kind as to explain the science behind the mind-scrambling statistics he's compiled. Twelve fights, 12 first-round stoppage victories.

The challenges though, continue to get bigger, and the next problem the engineer must solve is the biggest in MMA right now: UFC heavyweight championBrock Lesnar. When he and Lesnar meet this summer, likely on July 3 in Las Vegas, it will be -- quite literally -- huge. In fact, the biggest title matchup ever, at least in terms of bulk. And the interest level for the fight might just match the oversized participants

Shockingly, Carwin-Mir marked the first time in major MMA history that a heavyweight championship match included two men who weighed in at the 265-pound limit. It had never happened in PRIDE; it had never happened in the UFC. The second time is on the way. But Lesnar is naturally much larger than Mir, who has weighed in the 245-255 neighborhood for most of his career and had bulked up in hopes of a rubber match with Lesnar.

Instead he was beaten by the monstrous Carwin, and now, he and Lesnar will usher in the new age of superheavyweights

"It's going to be a heavyweight championship fight with two real heavyweights," UFC PresidentDana White said. "It's going to be fun, and it's going to be big."