ditching their masks, even indoors, while others continue to harass people who walk around outdoors without a mask.

All the while, the scientific evidence points to a conclusion that is much simpler than the C.D.C.’s message: Masks make a huge difference indoors and rarely matter outdoors.

masks remain rare.

It certainly doesn’t seem to be causing problems. Since January, daily Covid deaths in Britain have declined more than 99 percent.

cramped train ride to Manhattan.

Almonds, oats, rice: Are plant milks good for you?

A Times classic: Here are the climate risks facing your country.

Lives Lived: Critics called the postmodern buildings of the architect Helmut Jahn “dazzling,” “convention-busting” and “unrelated to anything else in the whole of Western civilization.” He died at 81.

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