Bird flocks, bacterial swarms, and even crowds move according to interaction rules that appear to break one of physics’ most fundamental principles: Newton’s law of action and reaction. Birds can see much of what is happening around them, but when flying in a flock, they respond only to birds beside them or ahead of them. [...]

Amid declining test scores, the country has pivoted away from screens and invested in back-to-basics school materials.

A prolonged drought means the nation’s largest reservoirs are dwindling, and litigation over access to water could lie ahead.

A prolonged drought means the nation’s largest reservoirs are dwindling, and litigation over access to water could lie ahead.

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As the midterm elections approach, many leading Democrats are rethinking their approach to climate change.

As the midterm elections approach, many leading Democrats are rethinking their approach to climate change.

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New guidance from the Energy Department would prevent people from receiving rebates after making such swaps.

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The rules were established by the Biden administration after research linked the compounds to a range of serious health problems.

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