Images of some of the fans as they have cheered and commiserated with their teams through wins and losses over the past month of championship play

Readers respond to our March 2021 issue.

Humans have an image problem. But we might be able to use it for good.

The nation wants to eradicate all invasive mammal predators by 2050. Gene-editing technology could help—or it could trigger an ecological disaster of global proportions.

The planet’s tallest animal is in far greater danger than people might think.

Bird breeders pushed a Venezuelan finch to the brink of extinction so that canaries could be red.