• Space/Science
  • GeekSpeak
  • Mysteries of
    the Multiverse
  • Science Fiction
  • The Comestible Zone
  • Off-Topic
  • Community
  • Flame
  • CurrentEvents

Recent posts

The Great Lie of War BuckGalaxy March 5, 2026 9:23 am (CurrentEvents)

Overheard on the internet... ER March 4, 2026 4:37 pm (CurrentEvents)

I hate waking up to war podrock February 28, 2026 11:04 am (CurrentEvents)

The religion of nonreligion can be like nonalcohol beer: What’s the point? BuckGalaxy February 28, 2026 2:25 am (Off-Topic)

MAGAlomania unleashed again BuckGalaxy February 28, 2026 2:21 am (CurrentEvents)

‘We’re Going to the Moon and Mars’ BuckGalaxy February 26, 2026 8:41 pm (Space/Science)

Is This the Most Important Supreme Court Case of the Century? BuckGalaxy February 22, 2026 8:56 pm (CurrentEvents)

Supreme Court tries to do Trump a favor BuckGalaxy February 20, 2026 10:58 am (CurrentEvents)

Role reversal ER February 20, 2026 7:58 am (Off-Topic)

When Will This War End? The Question Is Meaningless. BuckGalaxy February 15, 2026 5:56 pm (CurrentEvents)

AI progress RL February 14, 2026 1:59 pm (Space/Science)

A Rubicon of Sorts ER February 12, 2026 5:33 pm (Space/Science)

Home » Space/Science

Oxygen in the news October 9, 2013 12:00 pm RobVG

“Is Oxygen a False Positive for Alien Life?”

“The Mystery of Earth’s Oxygen”

  • Does anyone know the spectral requirements of chlorophyll? by ER 2013-10-09 12:23:14
    • I don't think that would really matter . . . by DanS 2013-10-10 06:59:26
      • Maybe there is no substitute for chlorophyll. by ER 2013-10-10 09:32:03
        • . . . we may very well be alone . . . by DanS 2013-10-10 11:33:25
          • I really hate it too. by ER 2013-10-10 11:50:44
            • The Drake Equation. . . by DanS 2013-10-10 16:31:47
              • I wouldn't put too much creedence in any of those hypotheses. by ER 2013-10-10 18:24:34

    Search

    The Control Panel

    • Log in
    • Register