I think everyone know that $\mathbb{C}$ is an extension of $\mathbb{R}$.
Now I wondered if there exist an transcendental extension of $\mathbb{C}$
I know it's a short question but I can't find any extension, so I would say no, but can someone confirm that?
Yes, the field of rational functions $\mathbb C(x)$ is a transcendental extension of $\mathbb C$.
(Also, $\mathbb R(x)$ is a transcendental extension of $\mathbb R$,
whereas $\mathbb C$ is an algebraic extension of $\mathbb R$.)