The Physics of Sunsets.
NatGeo visits the coldest city on earth.
This Feb. 5, 1865 photo of President Abraham Lincoln in Washington is the last one taken of him.
How did Robert E. Lee die? His earlobe may have the answer to that.
You Can (Probably) Still Drink the World’s Oldest Bottle of Wine.
ICYMI, Friday’s links are here, and are all Groundhog Day or Super Bowl related: Groundhog Day, Candlemas and weather predictions, Punxsutawney Phil has been correct 39% of the time since 1887, how long Bill Murray was stuck in Groundhog Day (8 years? 34 years? hundreds of years?), Life magazine archive of photos from Super Bowl 1, football during WWII, when almost all able-bodied men joined the military (this led to a combined Steelers/Eagles team called the Steagles), and whether or not footballs were ever actually made of pigskin.