For an easy and efficient way to keep your hard floors spotless, snag this robot vacuum cleaner while it's on sale.

Unfortunately, "less is better" is not a catchy marketing slogan.

India finishes last of 60 countries in environment and sustainability, as ranked by the expats who work there.

Dr. Kate Biberdorf explains why boiling water makes it safer and how water molecules are unusual and cool.

Understanding the math behind social distancing.

What symptoms to watch for, how to get tested, what to do if you're sick, and when to go to the doctor.

Misinformation is rampant—but it is the Internet.

Researchers evaluated the best and worst ways to remove greenhouse gases from the atmosphere in a recent report.

For decades, Americans sprayed the notorious pesticide DDT all over their homes and fields. But it turns out we may have known about — and ignored — a safer alternative used by the Nazi regime.

After China stopped accepting recylables, California was put in a tough place.

An ecological silver bullet is missing the target altogether.

They're hiding in your house, carrying germs, and now there's virtually no way to kill them.

A NASA astronomer explains how astronauts dispose of their, uh, dark matter.

You may not recognize the names, but these seven scientists have improved the lives of people the world over.

The next gold rush might take place in our sewers.

Antidepressants are destroying underwater ecosystems, which we in turn eat.

1.5 million children die each year from preventable diseases arising from poor sanitation systems. That's why some of the world's top scientists are working to make a 21st-century toilet without links to water, energy, or sewer lines, and which costs users under $0.05 a day.