STS-007 the space shuttle Discovery launched safely due to freak weather conditions which meant that nothing went wrong.
However a side-effect of this was that all the Chinese river dolphins on the Yangtze River suddenly vanished from space time. This makes them the first functionally extinct species in over ten years and this caused the Natural Society for the Preservation of the Past and it's Effects on the Future to launch an investigation into why they had disappeared. This lead to extremely odd discoveries; they found that although the dolphins had ceased to exist now they had most defiantly been sent to some place within our past, and that it was possible that all life that has ever existed evolved from the dolphins sent back to the primitive oceans.
Which begs the question where did they come from themselves? Did they arrive on earth of their own accord of were they sent to carry out this one duty of creation of life? The only other explanation cannot be explained as it is anomalous and is almost defiantly, though possibly slightly not, wrong in every possible and important way conceivable. It is due to this that their findings were reviewed and it was discovered that although the first report was a correct, it was also utterly wrong.