deaf child home sign system community feedback language

A deaf child can create a home sign system

A deaf child without access to an established sign language may create signs used within the family and develop a few rules for combining them. Without support or feedback from a wider community, the system does not become a full language.

A rainy winter can turn the Dead Sea red

In 1980, a rainy winter lowered the Dead Sea’s salt level. Algae called Dunaliella nourished red-pigmented bacteria, and the brief microbial bloom turned the usually dark-blue water red.

Damselfish protect shrimp that fertilize their algae

Longfin damselfish guard patches of algae on coral reefs. They allow small mysid shrimp to live there because the shrimp's waste fertilizes the algae. The fish get better-growing food, while the shrimp get protection from predators.

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deaf child home sign system community feedback language

A deaf child can create a home sign system

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