Not science-y maybe, but as a geometry fan, this is what I decided to draw on my own leg when I impulsively bought a tattoo gun.

France is Bacon?

Knowledge = power = energy = mass, which is why time dilates while you're in a book shop. (Sorry to Terry Pratchett.)

Hmm. How about an event horizon tat? Any interest?

I'm a big fan of the voyager pulsar map. I haven't got it yet but could come in handy if I get lost

Botany counts, dammit

Ohh I am in the process of convincing my wife to let me get my light cone tattooed on my arm. Just a small flat versions. Nothing super fancy I just like to envision a tattoos that is relative to me.

I have other dumb ones from when I was younger but they're not who I am now.

But my time cone the dot being my present and the cones a reminder of where I have come and where I am going, along with the limitations of the universe