From 9-foot tall ostriches to albatrosses with gargantuan wingspans, here are some of the biggest birds in the world.

Understanding how wildfires influence our planet's climate is a daunting challenge. Although fire occurs nearly everywhere on ...

Scientists found a rhythmic mantle plume beneath Ethiopia is slowly tearing Africa apart - hinting at the birth of a new ...

The thick, mineral-rich layers of clay found on Mars suggest that the Red Planet harbored potentially life-hosting ...

Micrometeorites raining down from space may have provided the perfect surfaces for the first primitive cells to form on Earth ...

Each year in the U.S., an estimated 6.1 million people are treated for skin cancer, and that number is growing.

"Being off even a little bit represents hundreds or thousands of kilometers in distance on the surface of the Earth." ...

Our planet has been asteroid-smashed, melted and eroded, enough that most of its original armor has been long buried. Except ...

Geologists have long debated whether a stony formation in Canada contains the world’s oldest rocks – new measurements make a ...

Even if Earth does survive, it won’t be pretty. The temperature of our planet will be about 1,300 degrees C, hot enough to ...

For the service's 20th anniversary, Google was inspired by a social media trend from last year in which people shared ...

Most meteorites that have reached Earth come from the asteroid belt between Mars and Jupiter. But we have 1,000 or so ...