carbon dioxide
Flowing Martian Water was Protected by Sheets of Carbon Dioxide
Mars' ancient climate is one of our Solar System's most perplexing mysteries. The planet was once wet and warm; now…
From Frozen to Sweltering: Earth’s Climate Over the Last 485 Million Years
Earth's last half-billion years were action-packed. During that time, the climate underwent many changes. There have been changes in ocean…
Life Might Thrive on the Surface of Earth for an Extra Billion Years
The Sun is midway through its life of fusion. It's about five billion years old, and though its life is…
Our Carbon Dioxide Emissions Have a Mesmerizing Side
Our CO2 emissions are warming the planet and making life uncomfortable and even unbearable in some regions. In July, the…
The LIFE Telescope Passed its First Test: It Detected Biosignatures on Earth.
We know that there are thousands of exoplanets out there, with many millions more waiting to be discovered. But the…
Another Explanation for K2-18b? A Gas-Rich Mini-Neptune with No Habitable Surface
Exoplanet K2-18b is garnering a lot of attention. James Webb Space Telescope spectroscopy shows it has carbon and methane in…
JWST Takes a Detailed Look at Jupiter’s Moon Ganymede
Nature doesn't conform to our ideas of neatly-contained categories. Many things in nature blur the lines we try to draw…
The JWST Just Found Carbon on Europa, Boosting the Moon’s Potential Habitability
Most planets and moons in the Solar System are clearly dead and totally unsuitable for life. Earth is the only…
Geoengineering is Shockingly Inexpensive
Despite decades of warnings and international climate agreements, global carbon emissions are still rising. Carbon emissions seem like an unstoppable…
JWST Finds a Comet Still Holding Onto Water in the Main Asteroid Belt
Comets are instantly recognizable by their tails of gas and dust. Most comets originate in the far, frozen reaches of…