For a few moments there I thought I'd invented SciKu (science-inspired haiku). Apparently I did not invent it, but now that I've discovered it, I keep creating new ones. Here's a few that came to me today. I suspect others will follow . . .

Tilted as we spin

Roughly 23 degrees

Seasons come and go

A useful sequence

I would like to make some more

Bring on PCR

Photons from the sun

H2O and CO2

Photosynthesis

Once one of the nine

Pluto joined the Kuiper belt

A planet no more

A special number

Not in any times table

It must be a prime