Uploaded November 2020 | Updated September 2026, 3 weeks ago
This billion-year marble clock is for conceptualizing geological and cosmological time. These are time durations on the order of millions and billions of years. The configuration of marbles on the platforms show the time duration. More marbles on lower platforms correspond to longer durations of time. When 10 marbles appear on a platform, it causes the platform to tip discharging nine marbles and one marble drops onto the platform below it. Darker blue-colored marbles represent accurately known times.
This billion-year marble clock is for conceptualizing geological and cosmological time. These are time durations on the order of millions and billions of years. The configuration of marbles on the platforms show the time duration. More marbles on lower platforms correspond to longer durations of time. When 10 marbles appear on a platform, it causes the platform to tip discharging nine marbles and one marble drops onto the platform below it. Darker blue-colored marbles represent accurately known times.
