A large crack that has suddenly appeared in Kenya’s Rift Valley is evidence that Africa will eventually break apart. The crack already stretches several miles and continues to grow, but it does not go all the way across the surface. If it does, it will split the continent into two. The crack has caused part of the Nairobi-Narok highway to collapse and also accelerating seismic activity in the area, leading researchers to believe that something dramatic could happen in the future. “The Great Rift splits Africa into two plates. With what is happening we have established one plate which is...