The Sumerian empire used wedge-shaped marks pressed into damp clay for keeping records.
This style of writing is known as Cuneiform Script. The word Cuneiform is adopted from the Latin word cuneus, means wedge. This style of writing was then adopted by Akkadian Empire.
False. For a timeline to be meaningful it should contain a factual body rather than an artistic touch for the audience to have a more accurate understanding to the said timeline. By being more factual, you are unleashing a deeper meaning to what is originally a beautiful timeline thus by adding an artistic touch, it may add some meaning yet it isn't the secret ingredient of having a timeline that is very meaningful.