Raúl Alva

@alvagraul

Dr Ciencias, Mtro Biología Experimental, Lic Biología UAM, Dipl Educación CIPAE, Dipl Aprendizaje con Tecnologías Digitales MIT, Dipl Riesgo Ambiental INE

Happy #CarlSaganDay ! "The sky calls to us" - Carl #Sagan At the entrance of STS #Atlantis Exhibit @NASA KSC, 2013

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1198 days ago

Happy #CarlSaganDay ! "The sky calls to us" - Carl #Sagan At the entrance of STS #Atlantis Exhibit KSC, 2013

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