I read somewhere (if someone remember it, please tell) a short history about life in neutron stars. It would be incredible fast due to the abundance of energy, with the evolution from 'stone age' to computer age happening in milliseconds.

Due to being in a deep gravitational well, such life and life inside a star are forever isolated from us. Unless they discover a way to use solar flares, in fact, perhaps solar flares are their way to escape the surface of the sun.