deaf children signing families language development timetable

Deaf children can develop sign language on the same timetable as spoken language

Deaf children raised in families that use sign language begin early hand babbling and develop expressive signing on roughly the same timetable that hearing children develop spoken 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 children signing families language development timetable

Deaf children can develop sign language on the same timetable as spoken language

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