An active rift in the African continent has reached a “critical threshold” and will break apart soon. "We found that rifting in this zone is more advanced, and the crust is thinner, than anyone had recognized," says Christian Rowan, a geoscientist at Columbia University. Here’s more from @ScienceAlert, including just how soon “soon” means:https://flip.it/0HeDb2#Science #Africa #Geology #Earth #Nature