Water, Water, Every Where — And Now Scientists Know Where It Came From
Some unusual meteorites suggest that Earth got its water at its start, rather than forming dry and being watered by comets later on.
earth
NASA Launching New Satellites To Measure Earth's Lumpy Gravity
The two satellites, which are collectively called GRACE and will replace two retired probes, are one of the most important tools for understanding the effects of climate change.
Earth's 'Bigger, Older Cousin' Maybe Doesn't Even Exist
In 2015, to great fanfare, NASA announced a planet discovery considered a milestone in the hunt for another Earth. But now some researchers say it's not clear that this planet actually exists.
Getting Climate Change Right: In Light Of The Stars
When it comes to facing global warming, dealing with climate change and making informed choices for our cherished "project of civilization," we've been asking the wrong question, says Adam Frank.
Video: A View Of A Breathing Earth
In this visualization, based on data collected by scientists, we see Earth changing — its plants, surface winds, and sea currents responding to the energy coming from the sun, says Marcelo Gleiser.
The Interdependence Of Humanity And Earth
We owe our existence to little photosynthetic bacteria — but there is much more to this story, as life can only mutate and adapt when the planet offers the right conditions, says Marcelo Gleiser.
Lessons From The Stars: How To Live On A Climate-Changed World
Classification of planets offers a way to see how Anthropocenes — and a successful route through them — might be part of a continuum of planetary evolution, says astrophysicist Adam Frank.
Hurricanes: A Science Primer
We know how damaging and costly, in many ways, such natural phenomena can be — but the devastation is not surprising, once you know how much energy is involved, says astrophysicist Marcelo Gleiser.
Do You Have What It Takes To Be NASA's Next Planetary Protection Officer?
The job posting has elicited headlines about how the space agency is seeking a person to defend Earth from aliens. But it's really more about microorganisms than little green men.
An Asteroid Is Swinging By Earth Today For Its Closest Visit In 400 Years
Don't worry: Astronomers say asteroid 2014 JO25, which is more than a third of a mile wide, will fly harmlessly past our planet. Still, it should come close enough to be visible with small telescopes.