Alan Yu

Patients who test positive locally are referred to as “presumptive” until the Centers for Disease Control and Prevention confirm the test results.

Is taking away the human factor the key to more just rulings?

There is no set time limit for how long students who come to the U.S. for college can stay. The Trump administration says that is a problem.

When online creators get hateful comments — who can help?

Sometimes, it means better conferences, as collaboration and access improve.

Intimidation and police force enraged protesters in Hong Kong. Is there a different way to manage masses of people?

Lab-grown meat for dogs and cats might be on the market before lab-grown meat for humans.

The Pennsylvania Department of Environmental Protection said heavy rain caused the hole, and that there was no contamination or environmental impact.

It wasn’t until a few years ago that researchers defined what really counts, to animals, as play.

These families have access to care, but getting appointments can be harder than it is for civilians, Children’s Hospital of Philadelphia research says.

It’s a tough question: Why do we look different? As one high school’s syllabus puts it, race is “both a biological myth and a social reality.”

The FDA recently approved a procedure to ease the trembling caused by Parkinson’s that doesn’t involve invasive surgery and cutting into a patient’s head.