* The universe is estimated to be 13.787 ± 0.020 billion years old. This age is based on measurements of the cosmic microwave background radiation, the faint afterglow of the Big Bang.

* Earth is estimated to be 4.54 ± 0.05 billion years old. This age is determined by radiometric dating of meteorites and lunar samples.

These figures are widely accepted within the scientific community and are based on extensive research and observations.