How to read this
Gravity isn't pulling you toward the ground
In general relativity, Earth's mass slows down clocks near its surface. Your head ages slightly faster than your feet.
Because you are always travelling through time, this gradient causes your path in 4D spacetime to pivot toward the slower region — which we experience as the downward acceleration of gravity!
Time is the horizontal axisDrag Earth, the NOW dot, or the traveler / wheels sideways to move through coordinate time. Everything at the same t sits on the translucent NOW slice.
Clocks tick slower near EarthDots on each altitude's line are equal proper-time ticks. They are sparse near Earth. The blue fan lines connect equal-τ ticks (effect exaggerated).
The tilt is gravityYour head advances through time faster than your feet. The two arrows show it, and the axle's heading turns toward the slow side. That turn bends the rose worldline, and the Human view shows it as a fall.
Launch heightDrag the amber handle up or down the space axis (or use the slider). The grey dashed line is the path without gravity.
Weak-field geodesic
a = −½ c² ∇g₀₀
Acceleration follows the gradient of the clock rate g₀₀.
Cyan: faster time (high)
Amber: slower time (near Earth)
Rose: worldline (solid = travelled, dashed = predicted)