| human genetics |
135,000/mo |
$1.71 |
| science experiments |
1,000,000/mo |
$0.71 |
| aids in africa |
135,000/mo |
$1.41 |
| avian influenza |
49,500/mo |
$3.58 |
| avian bird flu |
18,100/mo |
$1.52 |
| aids virus |
74,000/mo |
$1.89 |
| bird flu pandemic |
1,600/mo |
$0.86 |
| bird flue |
40,500/mo |
$1.63 |
| polio vaccine |
74,000/mo |
$1.85 |
| the greenhouse effect |
301,000/mo |
$0.97 |
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| bird flu virus |
2,900/mo |
$1.41 |
| middle school science |
110,000/mo |
$0.85 |
| health lesson plans |
27,100/mo |
$1.40 |
| what is hiv |
9,140,000/mo |
$3.02 |
| elementary science experiments |
18,100/mo |
$0.85 |
| science webquests |
5,400/mo |
$2.50 |
| avian flu pandemic |
1,600/mo |
$2.15 |
| 8th grade science |
135,000/mo |
$0.70 |
| human dna |
60,500/mo |
$2.80 |
| science lesson plan |
74,000/mo |
$1.11 |
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