Intermediate Word:  cipher -  (a) paradox  (b) cut in stone  (c) zero  (d) an amulet
Difficult Word: - ringhals  (a) venom-spitting African snake  (b) normal saline solution  (c) skin disease, with rash appearing in rings  (d) jewelry rings

Schepens Scientists Regenerate Optic Nerve For The First Time - SpaceDaily  For the first time, scientists have regenerated a damaged optic nerve - from the eye to the brain. This achievement, which occurred in laboratory mice and is described in the March 1, 2005 issue of the Journal of Cell Science, holds great promise for victims of diseases that destroy the optic nerve, and for sufferers of central nervous system injuries. Chen also believes that this combination BCL-2 and scar prevention technique could work to regenerate other Central Nervous System tissue, increasing the possibility that spinal cord patients could walk or move again.     
U.N: 2050 World Population To Hit 9.1B - SpaceDaily  Global population is expected to increase by 2.6 billion people, to 9.1 billion in 2050, - the equivalent of adding China and India's population today - the United Nations said Thursday. The increase is equal to the population of the world in 1950. The hike is expected mainly in developing countries. Hania Zlotnik, director of the Population Division of the Department of Economic and Social Affair, told reporters at U.N. World Headquarters in New York that "the world population is going to stabilize at about 9 billion. Because of its low and declining rate of population growth, the population of developed countries as a whole was expected to remain virtually unchanged between 2005 and 2050.

Space Watch: An Oasis On The Moon? - SpaceDaily  As the human race begins the in-situ human exploration of the solar system in the coming decades, one essential ingredient to that journey will be water - not only because it will suggest where alien life might reside, but also because future explorers will need it to survive and prosper. Two American probes found evidence that molecular hydrogen might be locked in large quantities near the moon's poles. Scientists theorized water ice might exist frozen on the floors of a handful of very deep polar craters which remain always in shadow. Scientists have estimated that as much as 6.6 trillion tons of ice could be available.     

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