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The Republican majorities in both houses of the US Congress will complicate the president's life, but do not necessarily presage disaster and may even bring out the best in the present incumbent.
The planned international observatory at Mount Graham, Arizona, provides a model of how environmental concerns should be met in a project of this size. But it remains vulnerable to Irresponsible "activists".
Many insights derived from the immune system apply elsewhere, as Nature's conference, "The immune system as a model organ" (Boston, 7–8 November) learned. But in other respects, the immune system remains unique.
