* separar palavras-chave com vírgula
Melhores sites Science 1-15:
1.
academia.edu 
494,204

2.
gizmodo.com 
440,696

3.
cbc.ca 
385,439

4.
Wired.com 
362,822

5.
nationalgeographic.com 
317,150

6.
masrawy.com 
307,225

7.
sciencemag.org 
302,578

8.
tamilwin.com 
280,422

9.
usgs.gov 
255,521

10.
space.com 
239,858

11.
sciencedaily.com 
232,759

12.
ucf.edu 
225,470

13.
thermofisher.com 
218,801

14.
uwaterloo.ca 
213,270

15.
tufts.edu 
194,012

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