Earth’s Age- How We Know Earth is 4.55 Billion Years Old | GEO GIRL
22:02
Where Did Earth's Water Come From? & How Do We Know? GEO GIRL
51:24
How We Know What Happened in Earth's Past, like Ancient Climate, Geology, & Extinctions | GEO GIRL
27:36
The Key to Geologic Dating- How Do We Know The Rock's Initial Isotope Composition? GEO GIRL
27:51
The "Boring Billion"- What Really Happened 1.8 to 0.8 Billion Years Ago? GEO GIRL
26:33
Life in the Cambrian & Ordovician ~542-444 mya | GEO GIRL
14:39
How Do We Know How Old the Earth Is?
32:01
Not ALL Tectonics is ‘Plate’ Tectonics (w/Steven Baumann!) | GEO GIRL
53:32