OpenAI built an AI coding agent and uses it to improve the agent itself.
Germany's train service is one of Europe's worst. How did it get so bad?
Covid Vaccines Reduced Children’s Likelihood of E.R. and Urgent Care Visits, the C.D.C. Reported.
Bit flips: How cosmic rays grounded a fleet of aircraft.
The Price of American Authoritarianism. What Can Reverse Democratic Decline?
Triple-negative breast cancer vaccine shows promise in early clinical trial.
‘Einstein Cross’ Reveals Ultrabright Supernova From an Unthinkable Distance.
The Death of Charlie Kirk Led to a New Age of Bosses Policing Social Media.