What are some commonly known facts that are too bizarre for you to believe to be true?

zirzedolta@lemm.ee to Asklemmy@lemmy.ml – 380 points –

For me it is the fact that our blood contains iron. I earlier used to believe the word stood for some 'organic element' since I couldn't accept we had metal flowing through our supposed carbon-based bodies, till I realized that is where the taste and smell of blood comes from.

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It gets better. The size of the SD card isn't the storage area. Look carefully at the back of an SD card and you should see how a tiny square area in the middle is a bit 'thicker' than the rest; that's the actual chip, that tiny bump!

SD cards make sense to me. Hard Drives... Now there is some spooky technology.

The reader head on a hard drive changes direction so fast, that it experiences accelerations like that of a bullet being fired, hundreds of times a second.

The "Fly height" or distance a reader floats above the platter is so tiny, that it would crash into a thumbprint.

The actual magnetic media that stores your data is a layer of iron a few atoms thick deposited on to a ceramic or glass platter, with a single atom layer of a protective metal coating (typically rhodium) in top of it.

Despite these incredible tolerances, they damn things are dirt cheap, and surprisingly reliable.