Atmospheric carbon levels nearing historic threshold

(Phys.org) —For the first time in human history, concentrations of the greenhouse gas carbon dioxide (CO2) could rise above 400 parts per million (ppm) for sustained lengths of time throughout much of the Northern Hemisphere ...

What glows green in space?

While a quest for green beer in space would be difficult, we're happy to report there are other ways you can celebrate Saint Patrick's Day while looking at the night sky. Just check out the nebulae and aurorae in these pictures!

Mineral diversity clue to early Earth chemistry

Mineral evolution is a new way to look at our planet's history. It's the study of the increasing diversity and characteristics of Earth's near-surface minerals, from the dozen that arrived on interstellar dust particles when ...

Researchers find new information about 'Snowball Earth' period

It is rather difficult to imagine, but approximately 635 million years ago, ice may have covered a vast portion of our planet in an event called "Snowball Earth." According to the Snowball Earth hypothesis, the massive ice ...

NASA designs new space telescope optics

Although hundreds of planets orbiting other stars have been discovered in the past 15 years, we cannot yet answer the age-old question of whether any of these planets are capable of sustaining life. However, new NASA technology ...

page 20 from 25