• Question: how old is the world

    Asked by 373epdp42 to Trystan on 13 Nov 2018.
    • Photo: Trystan Leng

      Trystan Leng answered on 13 Nov 2018:

      We think the world is about 4 and half billion years old. We used to think it was a lot younger, but in the 20th century scientists made big advances in accurately dating rocks, with a process called ‘radiometric dating’!