age of Earth

Our world's duration

The age of Earth is the time elapsed since the planet formed, estimated through radiometric dating at approximately 4.54 billion years.

The phrase appears in scientific, educational, and religious contexts, where it sometimes becomes contested: The age of Earth is a point of disagreement between scientists and young-Earth creationists.

Big BangUniverse's explosive origin
geologyStudy of Earth's composition
billionOne thousand million
fossilsPreserved ancient organism traces
radiocarbonDecaying carbon isotope

dating · fossil record · meteorites · zircon · Precambrian · strata · rock layers · dinosaurs · ancient · primordial · primordial soup · crust · formation · plate tectonics · rocks · uranium · decay · carbon dating

Opposites

cosmic temporal scale

age of Earthage of the universe

Duration since creation began

geological vs. human timescales

age of Earthrecorded history

Past preserved through documentation

momentary · instant · fleeting moment · blink of an eye · ephemeral

Family

age, aged, ageing, ages, ageless, ageism, earth, earths, earthly

Familiarity: Top 200,000
Profile: Known to kids · Used worldwide · Timeless · Everyday, not technical · Rated G