Construction site

Radiocarbon Dating at 75

Carbon-14, or radiocarbon, was discovered 75 years ago by Martin Kamen and Sam Rubin at the UC-Berkely Radiation Lab
A pocket of rust colored snow in a crater

The Surprising Colors of Snow

In mountain and other wilderness areas where deep snows last well into the spring, the snow may be tinted red, green, orange, or yellow.
A crowded highway in the midst of snow falling

DIY Weather Forecasting

Are there better options for weather forecasting than educated guessing?
Perspective of peering down a library aisle full of books on either side

Research Fraud: When Science Goes Bad

At its worst, science research fraud might have deadly consequences. What can be done about it?
The planet Mars

Is There Life on Mars?

Is there life on Mars? Probably not, but it's likely that there used to be.
Neon vortex

A Universe Where Time Runs Backwards

Running out of time? Not in a universe where time runs backwards.
Illustration of the Kepler spacecraft

Kepler: The Little Telescope That Could

A year after a potentially fatal setback, a rejuvenated Kepler telescope discovered the first exoplanet (outside the solar system) of its new mission.
Ice floes float in icy water

Hidden Ecosystems Under Arctic Ice Reveal Themselves

Thanks to remotely operated vehicles scientists are able to peek at one of the coldest, darkest environments of all: ecosystems deep underneath arctic ice.
A comet moving through a starry sky

Where is Water From? Probably Not Comets

A recently completed analysis of comet 67P/C-G by the Rosetta Space Craft has effectively ruled out comets as the primary source of Earth’s water.
Reese Witherspoon as "Cheryl Strayed" in WILD.

A Way in the Wilderness: The Pacific Crest Trail

The movie version of Cheryl Strayed’s searing memoir “Wild: From Lost to Found on the Pacific Crest Trail,” starring ...