S. Korea says second spy satellite placed in orbit

South Korea put its second domestically made spy satellite into orbit, Seoul's defense ministry said Monday, after it launched from an American space center on a SpaceX Falcon 9 rocket.

Using nature to help the climate: Four ways that work

A new study finds that four nature-based climate solutions—the ones that companies and other entities use most often to claim carbon credits—have robust scientific foundations. The four pathways are conservation or reforestation ...

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