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The Pacific purple sea urchin's appetite for kelp threatens marine ecosystems along the California coast as it ravages the "lungs of the ocean." The solution, biologists say, might be on our plates.

College basketball's March Madness has begun, the latest on American basketball star Brittney Griner who's detained in Russia, and a controversial trade shakes up the NFL.

The U.S. continues its work to economically isolate Russia, and most lawmakers are on board. Also: a look ahead to Monday's Supreme Court confirmation hearings.

The deaths of three journalists this week in Ukraine are a reminder of the perils of covering conflicts from behind a camera. Photojournalist Marcus Yam is on assignment in Kyiv covering the war.

Russia claims to have hit a weapons depot in Ukraine's west, and Ukrainians continue to seek refuge in other parts of their country, as well as neighboring countries.

Ukraine is outgunned by Russia but is making the most of its mobile weapons that allow Ukrainian troops to be more nimble. Some of the most important weapons are from the United States.

The Marines died from the crash of a V-22B Osprey aircraft during a NATO exercise unrelated to the Ukraine war, officials said.

Other addresses to Congress by foreign leaders have paled compared to Winston Churchill welding with his words the alliance that overcame Adolph Hitler, until Volodymyr Zelenskyy's this week.

The latest World Happiness report finds Scandinavian countries once again dominating the top of the rankings, while the U.S. climbed from 19th to 16th.

A White House official declined to lay out the specifics of any potential U.S. response, but said that Biden was "detailed" and "direct" with the Chinese leader.