Also, it’s a big week for the art market. Here’s the latest at the end of Monday.

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Also, melting ice is a growing menace in the Himalayas. Here’s the latest at the end of Friday.

© Doug Mills/The New York Times

Also, Ukraine is facing a dilemma in Pokrovsk. Here’s the latest at the end of Thursday.

© Tierney L. Cross/The New York Times