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Libby in 1949, and has become an indispensable part of the archaeologist's tool kit since.Fossil-fuel emissions are not only messing with our future, but they are also messing with our ability to accurately date the past.The U–Pb dating method can yield the most precise ages for early solar-system objects due to the optimal half-life of U.

Chondrules and calcium–aluminium-rich inclusions (CAIs) are spherical particles that make up chondritic meteorites and are believed to be the oldest objects in the solar system.

Hence precise dating of these objects is important to constrain the early evolution of the solar system and the age of the earth.

Successive collisions between accreted bodies led to the formation of larger and larger planetesimals, finally forming the Earth–Moon system in a giant impact event.

Talking Subatomic Particles, page 208 Contrary to popular opinion, subatomic particles do not talk.

By dating meteorites Patterson was directly dating the age of various planetesimals.