Innovative systems to keep ships from hitting North Atlantic right whales are coming into use. The Trump administration is weighing whether they can replace a bedrock protection.

© Sophie Park for The New York Times

This month, a North Dakota court barred Greenpeace from saying what it wanted in a European court, an unusual move. The environmental group says it is forging ahead.

© Robin Utrecht/ANP, via Alamy

Invasive snakeheads are proliferating in waterways from New York to Florida. Wildlife officials around the Chesapeake Bay are recommending a solution: high-powered compound bows.

© Caroline Gutman for The New York Times

While global warming is still a threat, the decision to back away from a worst-case outlook raises questions about whether some risks have been overstated.

© Apu Gomes/Agence France-Presse — Getty Images

Robert F. Kennedy Jr.’s MAHA movement has reshaped the public health debate. But if the coalition behind it begins to fracture, what comes next?

Readers largely disagree with a guest essay that argued that Democrats should not focus on it. Also: Violence against Latinos; school closings.

Trump is fighting the world’s stupidest culture war.

The Times unearthed memos that signaled a major shift in the court’s operations, in a decision that critics say was rushed and flawed.