Science

First we look at the fires burning in the Amazon -how they started, the response, and the impact on climate change. Then, we discuss threats to U.S. forests.

More teens and young adults — particularly girls and young women — are reporting being depressed and anxious, compared with comparable numbers from the mid-2000s.

The olfactory prowess of detection dogs is becoming an important tool in the fight against invasive plants and insects.

There have been more than 70,000 fires in Brazil so far this year, mostly in the Amazon, and about half of which have ignited in just the past month.

Scientific material requires the brain to process complex relations between concepts, between ideas, a Penn State researcher says.

It was supposed to be paradise, a slice of raw nature in a densely populated country. But things didn't go according to plan, and the conditions were ripe for controversy.

It was supposed to be a paradise. A parcel of wilderness, reminiscent of the past, where birds and large grazers would find refuge. Conse ...

Fires in Brazil's Amazon rainforest are proliferating at an alarming rate.

At Omni Recycling, a materials recovery facility in Pitman, N.J., one can see firsthand the mess that plastic has become for recyclers.

China is no longer taking the world's waste. The U.S. recycling industry is overwhelmed. This doesn't bode well for our plastic waste problem.

Pennsylvania is shutting down Three Mile Island for good next month. With the nuclear plant gone, how will the state produce carbon-free energy?

This is where Earth's refrigerator door is left open, where glaciers dwindle and seas begin to rise.

If you want to know what climate change will look like, you need to know what Earth's climate looked like in the past

From guitars to traditional medicines and from tusk to tail, mankind's exploitation of the planet's fauna and flora is putting some of them at risk of extinction.

New research from Carnegie Mellon University in Pittsburgh shows thousands of lives could be saved each year if air quality standards were tightened.