Must-see videos of the week: November 29

This week's must-see videos capture a rare spinning ice phenomenon, Japan's large-scale plans for the moon and an adorable father-son moment.

This bizarre ice merry-go-round appeared on the surface of Sheyenne River in North Dakota last week. A surprised hunter videotaped the twirl and later took to the internet to solve the mystery behind it. Turns out, it’s a rare but natural phenomenon that occurred because the ice froze too fast, before all of the river’s water cooled down. As a result, some ice broke away, got caught in a current and started to spin, forming a perfect circle in the process.

[ Last week's must-see videos: Little boy excited to get a bar of soap for Christmas ]

Want more science? Check out this amazing plan to belt the moon in order to generate power. Tokyo-based Shimizu Corp says a belt of solar panels could beam 13,000 terawatts of power to Earth, which is three times more power than was generated by the U.S. in all of 2011.

Inventors are amazing. He may not be building solar panels that can save Japan, but this ingenious Brazilian man built an excavator from syringes and other recycled materials. Watch him operate it:

What do you do with a baby and a camera? Make funny videos, of course! Check out this latest viral video of a dad trying to distract a hungry baby:

[ More Buzz: Video of toddler’s failed bicycle ride goes viral ]

Let's end the week with a concerning account of possible 'Knockout Game' attacks. A spike in random attacks lead investigators to believe that attackers are actually playing a "game." According to reports, this new trend involves people hitting unsuspecting strangers for no reason.

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