Waves? Measuring History? What’s this all about?
The wave to the left shows Saturn’s orbit compared to human growth milestones.
The wave to the right demonstrates the same wave used for a span of time between the alignment of two planets, the two here showing Saturn and Pluto for the span between 1947 and 1981. 
The beauty of the waves is that they appear the same across time for any planet pairing, making them a great standard for measuring history.
So using Waves as the title of a the blog about Measuring History makes sense to me.