The butterflies’ resilience shows that some species are capable of adapting to dramatic changes in climate, food availability and urban development.

For beekeepers, the problem isn’t just climate change and extreme weather: It’s also DOGE, the trade war and the immigration crackdown.

President Trump may be turning relations with NATO and Russia inside out, but winter war games revealed that two militaries’ cooperation was unchanged.

© Jim Huylebroek for The New York Times

A Trump administration budget proposal would essentially eliminate one of the world’s foremost Earth sciences research operations.

© Michael A. McCoy/Bloomberg

The president is trying new shortcuts to eliminate energy and environmental rules, but legal experts say the efforts could face high hurdles.

© Eric Lee/The New York Times

After halting federal attempts to combat global warming, President Trump is now targeting efforts by states to reduce greenhouse gases, setting up a legal clash.

© Eric Lee/The New York Times

The butterflies’ resilience shows that some species are capable of adapting to dramatic changes in climate, food availability and urban development.

Trump says one thing about toxins and does another.

A new report illustrates a concerning dynamic: Record heat last year pushed countries to use more planet-warming fossil fuels to cool things down.