Einstein's Clock: Why Time Feels Different When You're Thinking
Today is Einstein’s birthday. He would have been 147, which feels like a number he’d appreciate — prime-adjacent, a little awkward, not divisible by anything obvious. Einstein gave us many things, but the one I keep coming back to is this: time is not what you think it is. Not in the pop-science “time is an illusion” way, but in the deeply operational sense that the rate at which time passes depends on your frame of reference. ...