“What Is Something That’s So Common That We Forget Just How Crazy It Is?” (30 Answers)

Water is the only common material we know of that expands when it turns solid instead of compressing. Wild stuff. Imagine if ice sank.

Drinking a cow's breast milk

Work from home/remote.
Only spending the time at work that you get actually paid for is amazing and one of the best developments of modern times. People who demand that you waste your lifetime to come to an office when your work can be done remotely are just as ridiculous as people who think they have the right to 'test' their friends by making ridiculous and unnecessary demands just to see if they do it.

21% of our planet's atmosphere is made of plants burps.

In the 19th century, refrigeration and reliable canning processes made it possible for fresh meat and vegetables to be stored safely for long periods, and even shipped around the globe. All this replaced the reliance on salting and drying of these comestibles which damaged the food quality, didn't last well and then damaged the health of the consumers.

Refrigeration and canning have also reduced famines by allowing stockpiles of food to be built up and reduced the individual's need to collect and store their own stockpile just to get through winter.

The logistics of food delivery.

Billions of people rely on food being transported from its sources (farm, abattoir, fishery, etc.) all over the world, to local vendors on a daily basis. It happens so reliably that most people don't give it a second thought, nor give a thought to what would happen if it stopped.

Aluminum.

There was a time when aluminum was so rare that it was even more expensive than gold.

And now we just drink sodas from it and then throw it by the wayside.

We really still don't 100% know how anesthesia works. We have good theories and practice logs but the root of it is still a mystery.

Mobile phone. You have whole world's information in ur pocket

Circumcision for baby boys apparently. I know it’s controversial - but once I had a baby boy, it changed things for me. I never really thought about it. It’s just what I knew. Now I can’t imagine putting my kid through that.