cool

The devil is in the details, and if those details aren't specific civilizations can find themselves writhing around in complete confusion. This Tumblr thread points out how the Roman concrete recipe that makes it immune to water could've gone undiscovered/misinterpreted for so long because we never would've thought the recipe was calling for "seawater." Things spiral out of control quickly from there, and suddenly we're looking at a forecast for a future generation that's out there scrambling fish eggs because they never would've thought to use chicken eggs. Specifics are golden. 

Check out some more gold from Tumblr with this Tumblr user who inspired a meltdown after saying that fish aren't animals.

Wow, that's certainly enough trippy for the day. This fun Twitter thread from @Foone shines light on some bizarre things that our eyes are (or aren't) doing. It is troubling to think about a hostile alien race showing up one day that exploits our eyes' saccades, and manages to wipe us out because we can never see them, and all along our eyes have just been taking their best guess at what's around us. Maybe they're already here. Maybe that's why we can't see them. What an eye-opening thread. 

Some definite weird flexes in this quick Tumblr thread about the last words from various, famous authors. There's no telling what kind of potential jargon anyone is apt to spew when their time has come. Maybe words fall short in the face of death. 

Tumblr has got a raging petard for medieval battle tactics and the consensus seems to be that what the past lacked in sanitation, it made up for with cool swords and unconventional weapons. Sometimes you see some gizmo an Italian blacksmith threw together six hundred years ago and all you can think is "that is badass." Who knew history could be fun.