The mixing of the Earth's mantle may have slowed down much earlier in geological history than previously thought, say scientists looking at a rare form of tungsten in ancient rocks.
Source: http://www.cosmosmagazine.com/news/5308/ancient-earth-not-so-mixed-up-as-we-thought
Christina Aguilera Christina Applegate Christina DaRe Christina Milian Christina Ricci Chyler Leigh Ciara Cindy Crawford
