Explainer Zone™ on Instagram: "In this moment, a simple bottle balanced on top of a moving vehicle captures something surprisingly real about human behaviour — we get used to objects and routines so quickly that we sometimes overlook the smallest details. A bottle like this can remain upright only when the surface is steady, speed is controlled, and movement is smooth, showing how stable the ride actually is. While it looks funny and careless, it also reveals how friction, weight distribution, a

Explainer Zone™ on Instagram: "This video shows a vintage pen plotter, a type of early computer-controlled drawing machine widely used from the 1970s to early 1990s for technical drafting, engineering diagrams, maps, and typography. Unlike modern printers that spray ink, a pen plotter physically moves an actual pen across the paper using precision motors and coordinate commands. These machines were known for producing extremely accurate straight lines and curves, which made them essential for ar