Triple alpha process for the stellar nucleosynthesis of carbon in red giant stars.
The most important reaction in the Universe for the existence of life, on my right bicep. The curve of my arm means you can’t see the emission of the gamma-ray photon after the second step - but it does illustrate the 3-dimensional nature of space. It also means you can’t quite see the full quote from Joni Mitchell’s “Woodstock”, which is ”We Are Stardust…”.
Done by HB at Dr. Feelgoods, Poole, UK. I need a supernova next…..