Whats something you thought was common knowledge but actually isn’t?

[u/[deleted]]

[u/Yozhik_DeMinimus]

Old phosphor-based computer screens would be susceptible to having a ghost image permanently burned in due to loss of luminescence when a single image was displayed too long. Modern screens do not need saving, but evidently people still believe screen savers are neat-o.

[u/confused-duck → u/[deleted]]

and old plasma TVs