NuSTAR Reveals Radioactive Matter in Supernova Remnant

For the first time, NuSTAR has mapped radioactive material from the core of a supernova explosion.

A Changing View of Bone Marrow Cells

Using a novel microfluidic technique, researchers at Caltech have shown that, rather than simply replenishing immune cells after they become depleted, blood stem cells sense danger signals directly and quickly produce new immune cells.

NOvA Sees First Long-distance Neutrinos

The NOvA experiment, centered at Fermi National Accelerator Laboratory (Fermilab) near Chicago, has detected its first neutrinos.

Is Natural Gas a Solution to Mitigating Climate Change?

Methane, a key greenhouse gas, has more than doubled in volume in Earth's atmosphere since 1750. Its increase is believed to be a leading contributor to climate change. But where is the methane coming from? Research by atmospheric chemist Paul Wennberg of the California Institute of Technology (Caltech) suggests that losses of natural gas—our "cleanest" fossil fuel—into the atmosphere may be a larger source than previously recognized.

Caltech-Developed Method for Delivering HIV-Fighting Antibodies Proven Even More Promising

"The method that we developed has now been validated in the most natural possible setting in a mouse," says David Baltimore, president emeritus and the Robert Andrews Millikan Professor of Biology at Caltech.

Pinpointing the Brain’s Arbitrator

Caltech researchers have, for the first time, pinpointed areas of the brain that seem to serve as “arbitrators” between two decision-making systems, weighing the reliability of the predictions each makes and then allocating control accordingly.

A Detailed Look at HIV in Action

Researchers at Caltech are the first to have utilized high-resolution electron microscopy to look at HIV infection within the actual tissue of an infected organism, providing perhaps the most detailed characterization yet of HIV infection in the gut.

Worry on the Brain

Previous studies of anxiety in the brain have focused on the amygdala, an area known to play a role in fear. But a team of researchers led by biologists at Caltech had a hunch that understanding a different brain area, the lateral septum (LS), could provide more clues into how the brain processes anxiety. Their instincts paid off.

From Rivers to Landslides: Charting the Slopes of Sediment Transport

In Caltech's Earth Surface Dynamics Lab the behavior of rivers is modeled through the use of artificial rivers through which water can be pumped at varying rates over a variety of sediments.

Galaxies on FIRE: Star Feedback Results in Less Massive Galaxies

By incorporating the data of individual stars into whole-galaxy models, Caltech researchers can look at the actual effects of star feedback—how radiation from stars "pushes" on galactic matter—in the galaxies they study.

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