Before Joseph R. Biden Jr. was sworn in 2021, Donald J. Trump held the record for the country’s oldest commander in chief. He reclaimed the record on Monday.

“Your biggest issue is the perception of age,” Mike Donilon, the president’s longtime strategist, told him in 2022, according to people who heard him.

Biden’s disastrous debate performance highlighted age concerns.

Although long considered a disease of aging, certain cancers are turning up more often in younger women, according to a new report.

A new report points to a notable increase among U.S. women under 50. Experts point to a few likely causes.

It depends on what your goal is.

It’s finally time to start using the money you managed to save and invest over the years. But be careful: Taxes are just one of the tricky parts.

Wisdom, a Laysan albatross, has outlived at least three mates and the researcher who outfitted her with a tracking band in 1956.

© Dan Rapp/U.S. Fish and Wildlife Service, via Associated Press

“We’re putting another burden on the elderly that we don’t have to,” one researcher said.

© Bridget Bennett for The New York Times