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Determining the onset of the sixth mass extinction

The debate surrounding whether we are currently experiencing a sixth mass extinction event is ongoing. One of the main challenges is determining whether current species loss meets the criteria for a mass extinction event, typically defined as a loss of ~75% of species. Research has yielded mixed results, with some studies suggesting that while there are significant losses in certain groups like mammals and birds, others like bacteria, plants, and insects are not facing catastrophic losses.

Science, Biology, Evolution