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Low oxygen levels, coral bleaching getting worse in oceans

WASHINGTON — Global warming is making the world’s oceans sicker, depleting them of oxygen and harming delicate coral reefs more often, two studies show.

The lower oxygen levels are making marine life far more vulnerable, the researchers said. Oxygen is crucial for nearly all life in the oceans, except for a few microbes.

2 kiwi birds are rare bright spot in grim extinction report

TOKYO — Two types of New Zealand kiwi birds are a rare bright spot in a mostly grim assessment of global species at risk of extinction.

The International Union for the Conservation of Nature upgraded the Okarito kiwi and the Northern Brown kiwi from endangered to vulnerable thanks to New Zealand’s progress in controlling predators like stoats and cats.