Many major US monuments, including the Thomas Jefferson Memorial, are slowly turning from white to black, as biofilm - a catchall term for a group of microorganisms that come together to form slime - colonies start to run rampant in Washington DC.
Since research on biofilm is still in its infancy, the National Parks Service (NPS) is struggling to find ways to remove the slimy build up and restore the monuments back to their former glory.
All I know for sure is that if the NPS isn't calling female ghost busters, they're sexist haters.
