A recent study by Queen's University Belfast in Ireland has revealed an alarming decline in the number of more than 70,000 animal species worldwide, the largest study in history. The scientists found that 48 % species on Earth are currently in decline, while fewer than 3 % other animal species are increasing. At the traditional rate of species extinction, 28 % of life on Earth is currently threatened with extinction. The study also shows that the lack of species in increasing numbers indicates that other species are not evolving to replace extinct species in the ecosystem. The researchers said the findings "set a powerful alarm bell" because human-caused global biodiversity loss "is more alarming than previously thought." (Arab table)

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