A potent greenhouse gas, methane is released by many sources, both human and natural. Large cities emit significant amounts of methane, but in many cases the exact emission sources are unknown.

University of Maryland researchers created the first high-resolution image of an expanding bubble of hot plasma and ionized gas where stars are born.

The study, published in Nature, reveals that the vast majority of plants from European woodlands are dispersed by birds migrating to warmer latitudes in the south, while far fewer are dispersed by birds migrating north.

Our homes and offices are only as solid as the ground beneath them.

How many tree species are there in the forest? How are the trees scattered throughout?

If you listen to songbirds, you will recognize repeated melodies or phrases. Each phrase is made up of distinct sounds, strung together.

Large thunderstorms in the Southern Great Plains of the U.S. are some of the strongest on Earth.

Communities surrounding the Salton Sea, the inland body of water straddling California’s Riverside and Imperial counties, show high rates of asthma due, possibly, to high aerosol dust levels resulting from the sea shrinking over time.

A new study by Penn State researchers, who looked at emergency room admissions across the U.S. over a recent five-year period in a novel way, suggests that the agriculture industry is even more dangerous than previously believed.

As you drive down the highway, you may notice an increasing number of hybrid and electric vehicles.