Every year, we travel through time. In autumn, we travel forward in time by one hour, and in the spring, we travel back in time by one hour. Every four years we gain 24 hours in February, and every three or so years an extra second is added to a minute.
Time appears, and then – *poof* – disappears again. But, wait a minute (whatever a minute is). Time cannot spring in and out of existence, can it? Time loans the universe a second, an hour, or possibly a day until the deadline whereby the universe must pay time back, right? But where has time been all this time?
Time is hard to define. We measure time in years (the time it takes Earth to orbit the sun), days (one rotation of the Earth) and lunar months (the time it takes the moon to wax and wane). Time – hours, minutes, seconds, milliseconds, nanoseconds – are all manmade constructs. We made them up...read more>>>...