A new study shows that cosmic radiation could be accelerating the growth of our Earth forests, though - as with most cosmic radiation effects - we don't know how it's happening or what the effects are. But in accordance with standard "Science From Fantastical Space Radiation" practice, the results were only discovered by accident.
A team from the University of Edinburgh scanned samples from felled Scottish spruce trees to examine the rings. Which, when you think about it, is just like scanning a document but without all the intermediary steps. By examining the width of the yearly rings that form you can examine the growth of the tree over time, and while they were expecting climate factors to dominate cosmic ones turned up instead.