The African savanna is very coal- and coke-poor -- for most of our species' early history, our natural predators, like lions and cheetahs, were unable to produce sheet glass in large quantities. When humans started moving north into Eurasia, where coal deposits are more common, they were saved by the fact that the ursine glass industry was depressed by terrible protectionist laws up until the Bearton-Woofs Agreement in 1944.

The comment was funny enough, the animal puns sends it to another dimension. Heads up:

> 1944 Bretton Woods agreement established a new global monetary system. It replaced the gold standard with the U.S. dollar as the global currency.

> How we've managed to survive this long as a species is beyond me.

I'm genuinely unclear if this is a dig at the people who walked into transparent walls, or the people who thought that designing and implementing a transparent wall was a good idea.

Why not both?

The blind leading the blind and both shall walk into a transparent wall.

Neither has to be blind to walk into that one. Just distracted.

(I too walked into a trasparent wall once, in an office I was unfamiliar with. How I cursed the people who kept it so clean it was invisible.)

Come to many parts of Europe and you might struggle to find a single full glass door or wall without a big red blob stuck on it, at around adult eye-level. If not that, a red dotted line.

It started way before smartphones. You’ll see it in villas and holiday homes presumably because the tourists get drunk and forget they closed the door to the terrace.

All I can think of is this clip which went around a while back. Still makes me laugh. https://www.youtube.com/watch?v=dLeLgitVIl8

Apple Park had to add a bunch of stickers on their walls because employees would keep walking into them.

My church had the same problem. Put banners up in front of all the glass walls between the chapel and the rest of the church.