tboulay writes "The Texas Board of Education will vote this week on a new science curriculum designed to challenge the guiding principle of evolution, a step that could influence what is taught in biology classes across the nation. The proposed curriculum change would prompt teachers to raise doubts that all life on Earth is descended from common ancestry. Texas is such a large textbook market that many publishers write to the state's standards, then market those books nationwide. 'This is the most specific assault I've seen against evolution and modern science,' said Steven Newton, a project director at the National Center for Science Education, which promotes teaching of evolution." Both sides are saying the issue it too close to call. Three Republicans on the school board who favor the teaching of evolution have come under enormous pressure to reform their ways.