The Ultimate Sea Weed July 4, 1998 | Volume 154 | Number 1 Cover: The Mediterranean has been invaded by a beautiful but aggressive alien plant that is turning diverse seafloor ecosystems into monoculture meadows. Help may be on the way, however, as scientists investigate the possibility of unleashing some equally alien mollusks to graze on the newcomer.

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News of the Week:

Amyloid Can Trigger Brain Damage 

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Monopole search comes up empty-handed

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Mice help nail down gene for rare syndrome

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La Niña readies to steal El Niño's thunder 

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Scientists lose contact with solar craft

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Persistent pollutants face global ban

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Chemical switch cuts off melatonin

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Ancient North American shoes step to fore

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Fatal skin fungus found in U.S. frogs 

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Astronomy

Modeling the whole universe

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So cool, and some are still stars

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Revving up a neutron star

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Biology

Understanding the Big Bang of life

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Building a pancreas from scratch

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Science and Society

Informed consent—Not

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Journals make family secrets public

    The Mediterranean floor is being carpeted with a shaggy, aggressive invader

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Ringing Earth's Bell

    What makes our planet constantly quiver?

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