20 January 2025 marks a turning point in US science policy, with a series of executive orders drastically redefining the role of federal science and research agencies. A detailed analysis of the documents reveals an approach that fundamentally changes the basis of US climate, energy and biomedical research policy.

This comprehensive list shows the scope and breadth of the first day's interventions, which touch virtually every aspect of the federal government, from foreign policy to national security, from energy to immigration, from administrative reform to social policy.