Signs of life? Why astronomers are excited about carbon dioxide and methane in the atmosphere of an alien world
- Written by: Brad E Tucker, Astrophysicist/Cosmologist, Australian National University
NASA / CSA / ESA / J. Olmsted (STScI) / Science: N. Madhusudhan (Cambridge University)Are we alone? This question is nearly as old as humanity itself. Today, this question in astronomy focuses on finding life beyond our planet. Are we, as a species, and as a planet, alone? Or is there life somewhere else?
Usually the question inspires visions...