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.