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  1. National Briefing | Space and Technology: Tool Bag Is Lost During Spacewalk
  2. The Dead Tell a Tale China Doesn?t Care to Listen To
  3. Regenerating a Mammoth for $10 Million
  4. Findings: In Bias Test, Shades of Gray
  5. Bark Beetles Kill Millions of Acres of Trees in West
  6. Observatory: Drip Irrigation May Not Save Water, Analysis Finds
  7. Americans Skip Care
  8. Observatory: Using a Variety of Tools, Researchers Unravel Tale of German Graves
  9. Letters: Genes in the Spotlight (5 Letters)
  10. On the Farm: A Seafood Snob Ponders the Future of Fish
  11. In Times Square, a Company?s Name in (Wind- and Solar-Powered) Lights
  12. Shuttle Departs With Gear for Space Station
  13. As First Plan Stalls, Mayor Tries New Push for Green Taxis
  14. Handyman to Return to His Space Workshop
  15. Observatory: Cockroaches Plan Escape Routes, Study Shows
  16. The Lede: Tasting NASA's Recycled Water
  17. Pact Would Open River, Removing Four Dams
  18. Californians Drill for Day None Want to Arrive
  19. Visual Science: How Termites Live on a Diet of Wood
  20. First Pictures Taken of Extrasolar Planets
  21. Space Plumbers Ready for Shuttle Launching
  22. Dot Earth: Water Laws May Be Used to Fight Warming
  23. NASA Clears Shuttle Endeavour for Friday Launch
  24. Dot Earth: Will the Next Ice Age Be Permanent?
  25. Exploring Old Rome Without Air (or Time) Travel
  26. Everglades Deal Now Only Land, Not Assets
  27. National Briefing | West: Nevada: Costs Threaten Wild Horses
  28. National Briefing | West: Hawaii: Birds Hasten Digital TV Switch
  29. Dot Earth: Maldive Islanders to Save for a New Home
  30. Now: The Rest of the Genome
  31. Genetics Glossary
  32. Thoughts on Genes
  33. Mars Lander Succumbs to Winter
  34. Green Plans in Blueprints of Retailers
  35. Tolerance Over Race Can Spread, Studies Find
  36. Green Inc.: California Renewable-Energy Initiatives Defeated
  37. Dot Earth: The President and the Planet, on a Budget
  38. San Francisco Journal: At Specialty Garage, Making Hybrids Even Greener
  39. Findings: Basics | Obama and McCain Walk Into a Bar ...
  40. Minerals on Mars Point to More Recent Presence of Water
  41. A Conversation With Stuart L. Pimm: ?I realized that extinction was something that as
  42. Observatory: Commercial Production of Chickens Takes Toll on Genetic Diversity
  43. Observatory: Bacteria on the Move, Eating Their Fill
  44. Flights of Fancy Delight, Even Those of Paper Wings
  45. Efficiency?s Mark: City Glitters a Little Less
  46. NASA Probe Shows Mercury More Dynamic Than Thought
  47. Art Teams With Science to Explain It All to You
  48. Judge Kills Mayor?s Try at Greening Taxi Fleets
  49. Dot Earth: Science Advice for the Next President
  50. Observatory: Bat Disease Fungus Identified
  51. Pushing the Limit: For an Ex-N.F.L. Star, a Dream of Taking Sports to Space
  52. Mars Lander, Newly Quiet, May Be at Mission?s End
  53. Phoenicians Left Deep Genetic Mark, Study Shows
  54. Hubble Up and Running, With a Picture to Prove It
  55. Bio Lab in Galveston Raises Concerns
  56. Thoreau Is Rediscovered as a Climatologist
  57. The Mysterious Cough, Caught on Film
  58. Observatory: Ravenous Bugs Find a Hot Spot in Trees? Pine Cones
  59. In Rome, a New Museum Invites a Hands-On Approach to Insanity
  60. Observatory: Galaxies Made Simple, or at Least Less Complicated
  61. Q & A: Of Two Minds
  62. Letters: A Medical Blame Game (2 Letters)
  63. Letters: A Prize-Worthy Researcher (1 Letter)
  64. Letters: The Art of ?Grunting? (1 Letter)
  65. Letters: Mammography?s Limits (1 Letter)
  66. Europe Forcing Airlines to Buy Emissions Permits
  67. Saturday Interview: In Defense of That Daily Visitor, Unsolicited Mail
  68. Observatory: No Surface Ice Found in Moon Crater
  69. From a Strip of Scotch Tape, X-Rays
  70. NASA Set to Reboot Hubble, Again
  71. The Energy Challenge: Nuclear Power May Be in Early Stages of a Revival
  72. Port Authority to Let Commuters Buy Emissions Credits
  73. Dynegy to Warn Investors on Risks of Coal Burning
  74. The Food Chain: Drought Resistance Is the Goal, but Methods Differ
  75. Dot Earth: Climate Campaigners Were on Terrorist List
  76. News Analysis: Europe?s Leadership in Carbon Control at Risk in Credit Crisis
  77. Alternative Energy Suddenly Faces Headwinds
  78. A Taste for Blood
  79. Under Maryland Street, Ties to African Past
  80. Essay: The Terror and Attraction of Science, Put to Song
  81. Green Policies in California Generated Jobs, Study Finds
  82. Observatory: Shortage of Pollinators Is Not Affecting Crops, at Least for Now
  83. Letters: Asphalt and Reptiles (1 Letter)
  84. Letters: Parsing Words (and Lyrics) (1 Letter)
  85. Letters: When Imaging Falls Short (3 Letters)
  86. Q & A: Flighty Flies
  87. Exelon?s $6.2 Billion Bid for NRG Would Create Largest Power Utility in U.S.
  88. Federal Officials Seek to Relax Rules for Dumping Mine Waste
  89. If Elected ...: On Global Warming, McCain and Obama Agree: Urgent Action Is Needed
  90. National Briefing | Space and Technology: Hubble Telescope Out of Service
  91. Observatory: Worm Grunting: A Mystery Solved
  92. From Old Vials, New Hints on Origin of Life
  93. If Elected ...: Rivals? Visions Differ on Unleashing Innovation
  94. Man Who Helped Set the Stage for Nobel-Winning Work Has Left Science
  95. Fossil Fish Shows Complexity of Shift to Land
  96. NASA Ready to Reboot Hubble
  97. A Guiding Glow to Track What Was Once Invisible
  98. Thinking Anew About a Migratory Barrier: Roads
  99. With Little Fuel, Eco-Racers Arrive in Las Vegas
  100. Observatory: The Thrill of the Hunt Is Not Lost on Bonobos
  101. Observatory: Rising Temperatures May Dry Up Peat Bogs, Causing Carbon Release
  102. Q & A: Lunar Golf
  103. Letters: Diseases and Diagnoses (1 Letter)
  104. Letters: The Nuclear Energy Debate (2 Letters)
  105. Letters: Fighting Against Cancer (1 Letter)
  106. The Long Countdown: For U.S. Astronauts, a Russian Second Home
  107. Race Starts With Little Fuel, and Goes Uphill From There
  108. Tourist Blasts Off in Russian Rocket
  109. The Long Countdown: Russia Leads Way in Space Tourism With Paid Trips Into Orbit
  110. Next Mars Rover Mission on Schedule Even as Cost Rises
  111. Check Point: 2 Endorsements of Nuclear Power, but Sharp Differences on Details
  112. Math Skills Suffer in U.S., Study Finds
  113. New Cost Overrun Bedevils Planned Mission to Mars
  114. Observatory: Plant Seeds Hitch Rides on Traveling Shoes
  115. U.S. Requires Ships to Cut Speed in Waters Used by Right Whales
  116. Bicycle Commuter Tax Break Is a Bittersweet Victory for Measure?s Sponsor
  117. Indian Tribes See Profit in Harnessing the Wind for Power
  118. Pint-Size Eco-Police, Making Parents Proud and Sometimes Crazy
  119. Court Weighs Concerns on Whales and Military
  120. U.N. Says Biofuel Subsidies Raise Food Bill and Hunger
  121. European Legislators Back Emissions Rules
  122. Observatory: A New Flexibility With Thin Solar Cells
  123. Audubon?s Species: Bird Art, in All Its Glory
  124. Findings: A Gift From the ?70s: Energy Lessons
  125. Dawn of Low-Price Mapping Could Broaden DNA Uses
  126. New Jersey Grants Rights to Build a Wind Farm About 20 Miles Offshore
  127. Dot Earth: Tuna Imperiled by Its Bicoastal Habits
  128. Sunspots Are Fewest Since 1954, but Significance Is Unclear
  129. Seeing Red and Blue Can Divide a Species ? of Fish
  130. Mars Weather Forecast: Snow
  131. Shuttle Mission to Telescope Is Moved to ?09
  132. Suit to Halt Big Collider in Europe Is Dismissed
  133. Harsh Review of Restoration in Everglades
  134. National Briefing | Washington: Discoveries on Mars Suggest Past Presence of Water
  135. Lawmakers at Impasse on Incentives for Renewable Energy
  136. Private Company Launches Its Rocket Into Orbit
  137. Exhibition Review | Sant Ocean Hall at the Smithsonian National Museum of Natural His
  138. Swapping Land for a Road to Somewhere Divides Alaskans
  139. Spending Bill Would Resolve a Pressing NASA Concern
  140. Dot Earth: Emissions Flow Speeding Up
  141. Rocks May Be Oldest on Earth, Scientists Say
  142. TierneyLab: Obama's Science Quiz
  143. Climate-Change Program Gets New Funds and Home
  144. Solar Panels Are Vanishing, Only to Reappear on the Internet
  145. Power From the Restless Sea Stirs the Imagination
  146. After Hurricane Ike, Finding the Coastline Rearranged, Again
  147. Agency to Reconsider Taking Gray Wolves Off Endangered Species List
  148. Wind Farm Site Considered 10 Miles From Queens Shore
  149. Mars Rover Heads to a New Crater
  150. Art and Science, Virtual and Real, Under One Big Roof
  151. Observatory: A Tortoise May Be Bred Back Into Being
  152. Findings: Tapping Into What a Deer Sees, and Doesn?t
  153. It Takes Just One Village to Save a Species
  154. New Process Eliminates a Fertilizer?s Blast Threat
  155. Ban Near on Diverting Water From Great Lakes
  156. Observatory: Neanderthals Took Hunt for Food to the Sea
  157. Q & A: Wind Power
  158. Dot Earth: Portland Tops a Sustainable Cities List
  159. Conservancy Buys Slice of Adirondacks
  160. Bread Stays on Menu for Carp at Pennsylvania Lake
  161. Privately Owned Fisheries May Help Shore Up Stocks
  162. Observatory: Permafrost May Not Thaw Even During Global Warming
  163. Chicago Unveils Multifaceted Plan to Curb Emissions of Heat-Trapping Gases
  164. Transformer Glitch Shuts Down Biggest Atom Smasher
  165. A Maybe Planet, Orbiting Its Maybe Sun
  166. Berkeley Approves City-Backed Loans for Solar Panels
  167. Scientists Find One Specimen of Bizarre Primitive Ant
  168. Near New York Harbor, the Song of Whales
  169. Arctic Ocean Ice Retreats Less Than Last Year
  170. Independent Review Set on F.B.I. Anthrax Inquiry
  171. National Briefing | Rockies: Montana: Gray Wolves May Get Government Reprieve
  172. Presidential Candidates? Positions on Science Issues
  173. Weather History Offers Insight Into Global Warming
  174. Basics: Gut Instinct?s Surprising Role in Math
  175. The Energy Challenge: States Aim to Cut Gases by Making Polluters Pay
  176. Observatory: That Dog Is Bald, and Now We Know Why
  177. NASA Awards $485 Million Mars Project
  178. Letters: Trying to Save the Patient (1 Letter)
  179. Letters: Plants and Interlopers (1 Letter)
  180. Letters: A Gulf Between the Sexes (1 Letter)
  181. Letters: Incentives for Doctors (1 Letter)
  182. Letters: A Specialty Transforms (1 Letter)
  183. Seeking Mates for Furred and Clawed
  184. This Land: On an Infested River, Battling Invaders Eye to Eye
  185. Observatory: Luck Was Key to Dinosaurs? Survival, Study Suggests
  186. When in Doubt, Spit It Out
  187. Wind-Power Politics
  188. Tapping Power From Trash
  189. Observatory: Tiny Water Bears Triumph Over Outer Space
  190. Books of The Times: Call to Arms for an American-Led Green Revolution
  191. House Bill Would Loosen Coastal Drilling Restrictions
  192. An Icy Discovery on Mars, but Where?s the Water?
  193. Fingers Crossed, Physicists Are Ready for Collider to Roll
  194. Findings: As Barriers Disappear, Some Gender Gaps Widen
  195. Friendly Invaders
  196. Down Canyons and Up Cliffs, Pursuing Southwest?s Ancient Art
  197. Staying in a Tree, Delaying the Final Cuts
  198. Any River Will Do for One Spawning Fish
  199. Q & A: Water Vapors
  200. Letters: Dependency?s Long Reach (2 Letters)
  201. Letters: The Nitrogen Question (1 Letter)
  202. Letters: Primates and Grief (2 Letters)
  203. Observatory: Marijuana Ingredient May Fight Bacteria
  204. Dual Citizenship for the Woolly Mammoth
  205. Video Game Review: Playing God, the Home Game
  206. Brain Cells Observed Summoning a Memory
  207. $400 Million Gift to Genetic Institute
  208. Assessing the Value of Small Wind Turbines
  209. Strongest Storms Grow Stronger Yet, Study Says
  210. Gaming Evolution
  211. Basics: About Death, Just Like Us or Pretty Much Unaware?
  212. A Conversation With Heidi Hammel: An Astronomer Devoted to the Icy and Far Away
  213. Beyond Carbon: Scientists Worry About Nitrogen?s Effects
  214. Europeans? Genomes Reveal Their Geographic Origins
  215. Observatory: If Traveling Very Fast, the Very Small Just Stick
  216. Q & A: Brain Power
  217. Letters: Communing With Crows (1 Letter)
  218. Letters: Superintelligent Machines (1 Letter)
  219. Letters: The Prostate and Surgery (1 Letter)
  220. Letters: An Ovarian Cancer Test (1 Letter)
  221. Letters: Replacing Alvin (1 Letter)
  222. Air Mass in Atlantic Gives Speed and Power
  223. Another Voice Warns of an Innovation Slowdown
  224. Essay: Helping the Stars Take Back the Night
  225. Truce Is Reached in Battle Over Idaho Forest Land
  226. Observatory: Cinnamon Is Key Ingredient in Anti-Mold Wrapper
  227. Observatory: A Blow to the Oxygen Theory of Extinction
  228. California Moves on Bill to Curb Sprawl and Emissions
  229. Green Roofs Offer More Than Color for the Skyline
  230. Xcel to Disclose Global Warming Risks
  231. As Arctic Sea Ice Melts, Experts Expect New Low
  232. The Energy Challenge: Wind Energy Bumps Into Power Grid?s Limits
  233. California County?s Resolve Against Drilling Fades
  234. Serving Architects, Consultants in Everything Green Become Mainstays
  235. New Sphere in Exploring the Abyss
  236. Findings: Technology That Outthinks Us: A Partner or a Master?
  237. Deadly Pathogen Harms Florida Citrus Groves
  238. Friend or Foe? Crows Never Forget a Face, It Seems
  239. Study Maps Faults for New York Quakes
  240. Talking Directly, and Kindly, to Believers in the Eco Life
  241. Air Storage Is Explored for Energy
  242. U.S. Officials Will Review Pollution in Waterway
  243. Proposal on Ship Speeds in Whale Areas
  244. Letters: Short, but Intense (1 Letter)
  245. Letters: Calories and Evolution (2 Letters)
  246. Letters: Fat and Fit (1 Letter)
  247. Letters: A Cosmic Crossroads (1 Letter)
  248. Q & A: Night Noises
  249. Observatory: In Salmonella Attack, Taking One for the Team
  250. E.P.A. Sued by 12 States to Regulate Oil Refineries