New York Times: The Brookings Institution has compiled what it describes as one of the most comprehensive and up-to-date analyses of the US’s enigmatic green economy. For its report “Sizing the Clean Economy,” the institution collected data from every county and major metropolitan area in the US from 2003 to 2010. One point the report makes, writes Joanna Foster for the New York Times, is that although green initiatives are driving growth and innovation, market and policy challenges—such as financing shortfalls, inadequate support for innovation, and policy gaps that undercut market demand—are preventing those initiatives from reaching their full potential.
The finding that the Saturnian moon may host layers of icy slush instead of a global ocean could change how planetary scientists think about other icy moons as well.
Modeling the shapes of tree branches, neurons, and blood vessels is a thorny problem, but researchers have just discovered that much of the math has already been done.
January 29, 2026 12:52 PM
Get PT in your inbox
PT The Week in Physics
A collection of PT's content from the previous week delivered every Monday.
One email per week
PT New Issue Alert
Be notified about the new issue with links to highlights and the full TOC.
One email per month
PT Webinars & White Papers
The latest webinars, white papers and other informational resources.