Wonderful poem, Kat. A beautifully observed – I was going to say "reflection" but probably more accurate to call it a beautifully observed 'refraction" on human nature. With a scientific background myself I always enjoy poems like this, which manage to "re-weave the rainbow", humanizing a fully scientific understanding of the world.
It is also an excellent example of the slightly different and thoughtful effects which can be achieved through a longer tanka-style poem rather than haiku.
Thank you, Strider. Like you, I enjoy reading and writing poems that work on multiple levels. This tanka tickles me a bit for that very reason: the word "energy" refers to the literal Sun's energy and also to the somewhat abstract energy/effort we put into our lives, and so the word is meant to act as a pivot. I look forward to reading more of your poems and thoughts as well. Thanks for your thoughtful and kind comment!