SciFi, fact or fiction?

This article describes a timely coincidence in newly discovered life existing on the ocean floor. The fictional scientists in Juris Jurjevics' debut novel, The Trudeau Vector, also discovers new life forms in the frozen world of the Arctic. This article calls to question how much SF is really fiction? How many instances in history has an author written SF, only on a later date some discovery was made that claims the SF work as valid truth?