An escalating confrontation on Native land southwest of Tucson threatens to upend decades of uneasy cooperation between the Tohono O’odham Nation and the United States.

The federal judge denied a Democratic lawmaker’s request for an emergency hearing on the closure, which began on Tuesday.

Scientists have discovered a powerful gene-targeting system in viruses. Billions of years old, VIPR seems to predate CRISPR and may be even more effective.

A former superintendent in Joplin, Mo., is trying to apply what he learned to other shattered districts — and reckoning with the toll of the disaster on his own life.

The gene is found predominantly in Southern Appalachia and may be one of the most powerful cancer-risk mutations ever found.

Mistakes that led to the deaths of more than a hundred children “went beyond negligence,” investigators said. They also cited a separate strike the same day that killed a reported 22 civilians.

The policy, set to take effect Friday, would give immigration officers broader authority to deny permanent residency to people using public benefits.

The conflict underscored the distance between world powers over the United States’ pressure campaign on Iran.

Images captured through the windows of Air Force One showed President Trump reviewing a poster with the title “Kennedy Center DEMOLISHED.”

The face of London in the 1960s is living her best life at the age of 77.

This is what I see when I look at the picture Bo French hates.

Until the two countries can agree on what risks to worry about, cooperation is a distant dream.