緑のオアシスがつくる絹の道 - シルクロード (NASDA)
みどりIIのGLI画像。地形として面白い。
Infrared Zoo (Caltech)
赤外線でみる動物園。
イオンエンジン着火に成功 小惑星探査機はやぶさ (共同通信)
4基搭載されているイオンスラスタのうち1基を使って最初の着火試験に成功。他のスラスタの着火試験と、推力発生の試験も順次実施予定。ISASのプレスリリース(pdf)。ネタ元は Hirayan's S.D.。
NASA Delays First Mars Rover Launch at Least Three Days (Space.com)
NASAの火星探査機(2機のうちの最初のもの)打ち上げに少なくとも3日間の遅れ。今のところ打ち上げは8日の午後2時過ぎ(米東部時間)。
Y Chromosomes Sketch New Outline of British History (NY Times)
Y染色体が語る本当のブリテン史。ローマ帝国以前のケルト人の血は思われていた以上に残っていた。
it is perhaps not surprising that many Englishmen grow up believing they are a fighting mixture of the Romans, Anglo-Saxons, Danes, Vikings and Normans who invaded Britain. The defeated Celts, by this reckoning, left their legacy only in the hinterlands of Ireland, Scotland and Wales.
A new genetic survey of Y chromosomes throughout the British Isles has revealed a very different story. The Celtic inhabitants of Britain were real survivors. Nowhere were they entirely replaced by the invaders and they survive in high proportions, often 50 percent or more, throughout the British Isles...
"One tends to think of England as Anglo-Saxon," Dr. Goldstein said. "But we show quite clearly there was not complete replacement of existing populations by either Anglo-Saxons or Danes. It looks like the Celts did hold out."