On Christmas Eve, a surfer from Santa Cruz rode a wave at Mavericks that witnesses say was over 100 feet tall, which would set a world record. But how do you reliably measure a wave?

"What If is an epic exploration of possibilities. What If is a Webby Award-winning science web series that takes you on a journey through hypothetical worlds and possibilities, some in distant corners ...

These are the best free-to-play titles for PC players, and they're not limited to just one-time gameplay for a few hours.