Endangered corals get their own sperm bank

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Faced with an alarming loss of coral on Australia's Great Barrier Reef, scientists in Queensland are building a coral sperm bank to protect as many species as possible against extinction. A 2012 study estimates the reef has lost more than half of its coral cover since 1985, and the researchers fear that if the trend is not reversed, the sperm bank may be the Reef's last hope. Sharon Reich reports.