You might think of the passage of time as something that moves in a particular direction – from left to right, front to back, or clockwise around a dial. As MinuteEarth explains, there’s no uniform way of looking at the direction of time, and how humans even represent it differently based on the way their language is written.
Everything you’re watching and reading has already happened – even if it was just a few seconds ago. It’s Okay To Be Smart gets really deep with an exploration of how time is relative, and therefore experienced differently for each person depending on their place in the universe.
Ever wonder why we add a day to the end of every fourth February? Well, as it turns out, the Earth orbits the sun every 365.242 days, so we get off by about a quarter day every year. Dr. James O’Donoghue provides a concise graphical explanation of this time tweak we do to make things right, and what would happen without leap years.
(PG-13: Language) “Science is just magic that works.” exurb1a talks us through the strange science that explains how two pickles placed apart from each other have actually traveled through time at infinitesimally different speeds. Stick around until the end and you might actually learn a thing or two about physics.
If you ever had to explain the Earth’s timekeeping method to an alien civilization, you might find it challenging. As Minute Physics explains, what we call a day isn’t exactly what most of us think. For a more detailed explanation, the What Is a Day interactive lab is worth checking out.
Veritasium explores our ability to sync up images with sounds, even if they arrive at different times. Along the way, we learn how there’s a brief window of time that that we think of as the present, during which our brains can instantaneously alter our perceptions.