Research News

04/16/2014 14:25:50
Katie Neith
As reported in a paper published online today in the journal Nature, Caltech biologist David J. Anderson and his colleagues have genetically identified neurons that control aggressive behavior in the mouse hypothalamus, a structure that lies deep in the brain. Researchers have long known that innate social behaviors like mating and aggression are closely related, but the specific neurons in the brain that control these behaviors had not been identified until now.
01/30/2014 09:09:08
Katie Neith
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.
01/28/2014 11:36:26
Cynthia Eller
In the Earth Surface Dynamics Lab at Caltech the behavior of rivers is modeled through the use of artificial rivers—flumes—through which water can be pumped at varying rates over a variety of sediments while drag force and acceleration are measured.
01/22/2014 09:20:47
Jessica Stoller-Conrad
By incorporating the data of individual stars into whole-galaxy models, Hopkins and his colleagues can look at the actual effects of star feedback—how radiation from stars "pushes" on galactic matter—in each of the galaxies they study.
A still image from a FIRE simulation video, showing the gases in a galaxy. Magenta is cold molecular/atomic gas, which forms stars; green is warm ionized gas, most of which cools into a galaxy; red is 'hot' gas, which makes up the galaxy halo.
01/16/2014 09:02:47
Katie Neith
According to the latest studies from the fly laboratory of Caltech biologist David Anderson, male fruit flies fight more than their female counterparts because they have special cells in their brains that promote fighting. These cells appear to be absent in the brains of female fruit flies.
01/14/2014 09:05:07
Jessica Stoller-Conrad
"It was a tremendous surprise that the agent that drives metamorphosis is such an elaborate, well-organized injection machine," says coauthor Grant Jensen.
A rendered image of the porcupine-like array of phage tail-like contractile structures in P. luteoviolacea bacteria.
12/27/2013 10:21:27
Cynthia Eller
The subjects were asked to observe the shifting value of a hypothetical financial asset and make predictions about whether it would go up or down. Simultaneously, the subjects interacted with an "expert" who was also making predictions.
12/17/2013 08:45:39
Cynthia Eller

South-central Idaho and the surface of Mars have an interesting geological feature in common: amphitheater-headed canyons.

12/09/2013 15:28:34
New research articles on the Mars Science Laboratory mission have recently been published.
12/10/2013 09:06:30
Jessica Stoller-Conrad

Although researchers have determined the ages of rocks from other planetary bodies, the actual experiments—like analyzing meteorites and moon rocks—have always been done on Earth.

12/05/2013 09:00:08
Jessica Stoller-Conrad
"Traditional research has studied autism as a genetic disorder and a disorder of the brain, but our work shows that gut bacteria may contribute to ASD-like symptoms in ways that were previously unappreciated," says Sarkis Mazmanian.
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