what was the last thing you learned that made you say 'oh. wow.'?

My cousin put cedar logs in concrete, then sank them near my dock at the lake in my backyard to draw fish to the area. It really worked!

I turned too tight and drove over the curb today

The inner workings of a barometer.

Few hours back...an Excel formula.

octopuses... pi? (technically the first, not the second) have a blood based on copper, and 3 hearts.