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Science News Archive - February, 2007

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Tue
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1
234
2
186
3
98
4
120
5
183
6
210
7
222
8
218
9
214
10
120
11
114
12
196
13
207
14
220
15
193
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173
17
78
18
103
19
146
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182
21
148
22
213
23
128
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59
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146
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118
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162
Word of the Day
tessitura
  • The prevailing range of a vocal or instrumental part, within which most of the tones lie.
This word is Italian in origin and comes from the Latin 'textura,' web, structure.