It seems primitive, yet the wheel only appeared about 5,500 years ago, somewhere between Mesopotamia and Central Europe, long after pottery, weaving or copper smelting. The hard part wasn't the disk but a well-fitted axle. In Mesoamerica, wheels existed on toys but weren't used for transport, since there were no draft animals.
Around 2300 BCE, Enheduanna, daughter of King Sargon of Akkad, became high priestess of the Moon god at Ur. She composed hymns to the goddess Inanna and put her name to them. She is the oldest person identified as the author of a literary work, about 1,500 years before Homer.
Squeeze Earth's 4.5 billion years into a single 24-hour day. Homo sapiens shows up around 11:59:54 p.m., roughly six seconds before midnight. All of written history, from Sumerian tablets to today, fits into the final tenth of a second. A cosmic blink.