History of Earth (geological time) on a 30cm ruler Posted on May 16, 2020May 16, 2020 by Kit Rackley History of Earth (geological time) on a 30cm rulerShare this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to email this to a friend (Opens in new window)MoreClick to share on Pocket (Opens in new window)Click to share on Telegram (Opens in new window)Click to share on WhatsApp (Opens in new window)Click to share on Skype (Opens in new window)Like this:Like Loading...