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Each year, the park attracts millions of visitors and provides a home to countless animal species. But journalist David Quammen warns that balancing tourism and preservation can be tricky.

Hillary Clinton plans to use tonight's speech to declare a historic victory in the primaries, though Bernie Sanders shows every sign of fighting until the last primary in Washinton, D.C., next week.

In engineering the cell, researchers paired away nearly all genes that weren't essential to life. It might eventually serve as a basic framework for different sorts of cellular factories, they say.

A Harvard faculty member argues in his new book that averages tell us nothing useful about individuals. That has big implications for schools.

'Through Positive Eyes,' an exhibit of 145 photos, is opening in Durban as the International AIDS Conference begins.

Wellington Jighere of Nigeria was crowned world champ last year. He's one of many Nigerians who excel at the game. What's their secret?

Ornate refreshment kiosks were once the heart of Lisbon's parks and plazas. They faded away under a dictatorship that discouraged public gatherings. Now they're back to help revitalize the city.

Many young mixed-raced Asian-Americans embrace the Hawaiian word "hapa" to describe their identity. But are they legitimizing a slur, engaging in appropriation, or just making an old word new?

Confederate statues and monuments are coming down all over the country.

It can seem like there's a poll result that supports just about any position on any topic. Here's a look at what the latest immigration polls can and can't tell you.