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Public controversies that involve scientific uncertainty can be influenced by mavericks. Open confrontation and analysis serves the public better than excommunication.
Next month's general election in Germany may see the end of the Green Party's spell in government. The party has fared well, as has science with it, except where ideology won out over good sense.
A spiritual leader with an interest in research has encountered opposition to his plans to speak at a scientific meeting. But he is perfectly entitled to do so.