There isn't. The entire concept of the "afterlife" came into being to explain what happens after we die...Just like we previously thought the sky was the heavens, or that the earth was the center of the universe so we thought/think death=afterlife.

The concept of the afterlife also applies the notions that souls exist, which they do not. Souls was used to describe the human mind, emotions, etc. Now we know it's our brain that coordinates the various workings of the human body, not the "soul". In short there is and can never be scientific "proof" of an afterlife, just as there is and scientific proof of a god. You can deduce yourself, logically, that a afterlife likely doesn't exist however.