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Imagery from the Cold War’s Corona satellites is helping scientists fill in how we have changed our planet in the past half century.

Researchers enlisted quantum physics to send a “secret key” for encrypting and decrypting messages between two stations 700 miles apart.

Some astronomers who have criticized the company’s orbital internet constellation were encouraged by the measures it announced.

Two satellites docked together high above Earth on Tuesday, successfully extending the life of one that was running out of fuel.