[The program gave birth to the idea of retirement and covers nearly all Americans — but now it faces major financial and customer service challenges.

For three years, Sergei V. Kiriyenko has handled the political aspects of the war in Ukraine, rising among a cadre of skilled managers who oversee the sprawling Russian state.

Named for its razor-like teeth, Novaculadon mirabilis came from a rodent-like order that outlived the dinosaur extinction before vanishing about 30 million years ago.

[As companies like Amazon and Microsoft lay off workers and embrace A.I. coding tools, computer science graduates say they’re struggling to land tech jobs.