国际新闻

Why the U.N. Still Matters

来源: NYT > World News · 发布于

Why the U.N. Still Matters
来源: NYT > World News

A year ago, the United Nations appeared to be sidelined. But this week has reminded the world that it’s still useful.

A year ago, the United Nations appeared to be sidelined. But this week has reminded the world that it’s still useful.

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科学与环境

Scientists may have misread a 2-billion-year-old clue about Earth

Scientists have found that a famous 2-billion-year-old chemical signature, once thought to record a massive global change in Earth’s carbon cycle, may instead have been produced by local magma, hydrocarbons, and methane-eating microbes. The discovery raises new questions about wh

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