1. Arecibo Observatory
2. BBC Science
3. ESA-Space Science
4. News and Information for Geology & Earth Science
5. Fideicomiso de conservación
6. NASA Science
7. NOAA-National Oceanic and Atmospheric Administration
8. NSF- National Science Foundation
9. National Weather Service
10. Red Sísmica de Puerto Rico
11. Science Museum
12. Sociedad Ornitológica Puertorriqueña
13. The National Academies Press
14. US Environment Protection Agency
15. US Forest Service
16. Interactive Science Revision - Games and Activities
17. Biology in Motion
18. Actividades
19. Escuela Ciencias
20. Exploratorium
21. Factmonster - Science
22. Science FAir Project Resource
23. ESA - KIDS (Español)
