Posted at 9 p.m. Thursday, May 15

Lester Holt takes a break while hunting for crystal skulls among Mayan ruins.

I thought the “Crystal Skull” of the new Indy movie, “Indiana Jones and the Kingdom of the Crystal Skull,” was the creation of Hollywood writers.

Turns out it’s the creation of the ancient Maya, who believed that 13 legendary crystal skulls, when united, hold the power to save the Earth on Dec. 21, 2012.

At least that’s what newsman Lester Holt suggests in Sci Fi Channel’s “Mystery of the Crystal Skulls,” which airs at 8 p.m. Sunday. In it, Holt investigates whether a crystal skull that 1920s explorer F.A. Mitchell Hedges may or may not have found (questions swirl still) in Maya ruins in Belize may or may not have special powers. Some folks even swear the skulls were made by aliens!

Of course, Holt delivers no answers and solves none of the mystery here, but we do get to watch him sweat his way up a hill and complaining about the ocean currents while deep-sea diving.

Holt does mention that the legend of 13 skulls is similar to a “Battlestar Galactica” story line in which there are 13 human tribes. “BSG” also airs on Sci Fi. Coincidence?

Now there’s a mystery.

Sci Fi is making this weekend an “Indiana Jones” event, airing all three Indy movies twice before “Indiana Jones and the Kingdom of the Crystal Skull” opens in theaters on May 22. Here’s the schedule: