In 2019, the kilogram was redefined based on the Planck constant, a significant advancement in the field of metrology. This change, which stemmed from a desire for greater precision and stability in measurements, moved away from physical artifacts as standards. The redefinition of the kilogram reflects ongoing advancements in scientific understanding and the importance of accurate measurements in various fields, from science to commerce.

The redefinition of the kilogram in 2019 advanced concepts of fundamental constants, influencing late 20th-century science poetry. Poets began to explore themes of measurement, existence, and the nature of reality, reflecting on the implications of scientific discovery.