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• Debates

  Lets reconsider the basics of several sciences. Step 1. The crust of our Earth is floating on...... On what?

  Started by Jan de Boer, Paris, France

  35 comments

  Closed

• Debates

  

  SETI?

  Started by Tony Sanchez, Barcelona, Spain

  3 comments

  Closed

• Questions

  

  [Spanish-Español] Si se recibiera una señal de inteligencia extra terrestre ¿deberíamos responder? ¿qué deberíamos decir?

  Started by Lourdes Cahuich, Mexico City, Mexico

  21 comments

  Closed