How did scientists determine the age of the Earth?
to estimate the age of the earth, scientists used methods to determine radioactive isotopes of rocks on the planet and extraterrestrial meteorites.
Tags : the age of the earth
PSR B1620-26b - What's the oldest planet on the top of the 'elders' in the universe?
in theory, our universe was formed about 13.8 billion years ago but the planet psr b1620-26b is known for a lifetime of 12.7 billion years.