Friday links

February 5th is World Nutella Day - just in time for your weekend baking, here's a canonical list of Nutella recipes.

Submarine tourism didn’t catch on.

What If: Since Death Valley is below sea level could we dig a hole to the ocean and fill it up with water?

Some Super Bowl reading:

Life magazine archive of photos from Super Bowl 1.

An Animated Guide To American Football For Liberals, Ladies and Limeys.

Super Bowl stadiums (stadia?) made from meat.

Football during WWII, when almost all able-bodied men joined the military: The combined Steelers/Eagles team called the Steagles.

Why Championship Football Games are Called “Bowls”.

The Lost Tribe of Gypsy Harlots: The Mythical Invasion of the Super Bowl Hookers.

Were footballs ever actually made of pigskin?

'Super Bowl Babies' Come Together to Sing About Being Conceived After Super Bowl Victories. (From 2016 - if they've done an update I haven't found it.)

ICYMI, Thursday's links are here, and are all about Groundhog Day (the day and the movie) and/or February: why February is all about purification (februa = purify), what's up with February 2nd and weather predictions, how often the groundhog has been right (spoiler - 39% of the time since 1887), and doing the math on how long Bill Murray was stuck in Punxsutawney in the movie (8 years? 34 years?).