Stories by Julia Rosen

New work shows how grass could have developed its distinctive sheath

The planet’s spin may have mediated critical atmospheric oxygen

The gas is making climate change worse. Can we harness it instead?

Travel time differences for sound waves produced by undersea earthquakes in the same place at different times can provide details about ocean warming.

The mass-extinction asteroid happened to strike an area where the rock contained a lot of organic matter and sent soot into the stratosphere, where it could block sunlight for years.

Scientists determined that temperatures were 11 degrees cooler during the last ice age—and that finding has implications for modern-day warming. Julia Rosen reports. 

Every year, Alaska’s big salmon runs feature smaller salmon. Climate change and competition with hatchery-raised salmon may be to blame. Julia Rosen reports.

Scientists spotted a mouse at the summit of Llullaillaco, a 22,000-foot-tall volcano on the border of Chile and Argentina. Julia Rosen reports.

Meteorologists take advantage of weather data collected by commercial jetliners at different altitudes and locations. Fewer flights mean less data.

Researchers saw a third fewer vehicle collisions with deer, elk, moose and other large mammals in the four weeks following COVID-19 shutdowns in three states they tracked.

The gross ecosystem product, or GEP, tries to take into account the contribution of nature to the economy.

Narwhals, recognizable by their large single tusk, make distinct sounds that are now being analyzed in depth by researchers.

An expert on climate denial offers tips for inoculating people against coronavirus conspiracy notions.

Exoplanet hunters are moving beyond simply finding new planets into trying to know what they look like and whether there's surface or subsurface activity.

Scientists are exploring the use of fiber-optic cables—like the ones that form the backbone of the internet—to monitor earthquakes. Julia Rosen reports.

Following dietary guidelines would mean eating less meat and dairy—and fewer calories overall—reducing greenhouse gases and other pollution. Julia Rosen reports.

Exhaust fumes from oceangoing vessels lead to an almost doubling of lightning activity over shipping lanes compared to adjacent areas of the sea.

A trove of scientific notes from the early 1900s suggests a warming climate is driving birds to migrate earlier to New York’s Mohonk Preserve. Julia Rosen reports.

Century-old records found in Puerto Rico helped reconstruct the damage caused there by a magnitude 7.3 earthquake—and could help disaster experts plan for the next big one. Julia Rosen reports. 

Really big meteorite or asteroid strikes may cause melting and deep deformations that eventually lead to volcanic eruptions.

Starting in the next century, atmospheric carbon levels could begin to approach those of hundreds of millions of years ago, and have their warming effect augmented by a brighter sun. 

The storm that swept across the Rockies in September 2013 unleashed huge amounts of sediment downstream, doing the work of a century of erosion. Julia Rosen reports. 

Researchers used ancient climate cycles to confirm the solar system’s chaotic planetary orbits. An Earth–Mars collision is one distant outcome. Julia Rosen reports.

Critters living more than six miles below the ocean surface contain high levels of harmful compounds like PCBs and flame retardants. Julia Rosen reports.