# data[].attributes.body
The time taken for the radioactivity of a specified isotope to fall to half its original value.
the time taken for the radioactivity of a specified isotope to fall to half its original value.

# data[].attributes.body
The history of Earth concerns the development of planet Earth from its formation to the present day. Nearly all branches of natural science have contributed to the understanding of the main events of Earth's past. The age of the Earth is approximately one-third of the age of the universe.

# data[].attributes.body
The remains or impression of a prehistoric organism preserved in petrified form or as a mold or cast in rock.

# data[].attributes.body
An idealized cycle of processes undergone by rocks in the earth's crust, involving igneous intrusion, uplift, erosion, transportation, deposition as sedimentary rock, metamorphism, remelting, and further igneous intrusion.

# data[].attributes.body
In geology and related fields, a stratum (plural: strata) is a layer of sedimentary rock or soil, or igneous rock where formed at the earth's surface, with internally consistent characteristics that distinguish it from other layers.

# data[].attributes.body
The geologic time scale (GTS) is a system of chronological dating that relates geological strata (stratigraphy) to time. It is used by geologists, paleontologists, and other Earth scientists to describe the timing and relationships of events that have occurred during Earth's history.