Was Venus once a sweet spot for life?

• Autores: Aviva Rutkin
• Localización: New scientist, ISSN 0262-4079, Nº. 3086, 2016, pág. 8
• Idioma: inglés
• Texto completo no disponible (Saber más ...)
• Resumen

  • It's everything Earth is not: scorching hot, dried out and covered in toxic clouds. No wonder Venus is sometimes dubbed Earth's evil twin. But a mere one or two billion years ago, these two siblings might have had more in common. New simulations back the idea that the early Venus could have looked a lot like Earth- and been habitable. David Grinspoon and his colleagues aren't the first to imagine Venus as a hospitable world. It's similar to Earth in size and density, and the fact that the two planets formed close together suggests that their compositions are similar, too. Venus also has an unusually high ratio of deuterium to hydrogen atoms, a sign that it once had water delivered to the surface by comets, as we think happened on Earth