Earth
Threatened coral calls in the goby cavalry
Faced with encroaching seaweeds, small staghorn corals send out a chemical signal that summons gobies to eat the threat
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Faced with encroaching seaweeds, small staghorn corals send out a chemical signal that summons gobies to eat the threat
The US Endangered Species Act lets citizens nominate protected species – their selections have proved to be more endangered than government-nominated ones