News
- Neuroscience
Immune system may remember and adapt to stress
Mice without immune systems who receive stressed immune cells are less anxious and more social, suggesting that the immune system can adapt to stress.
- Paleontology
Snakes crawled among Jurassic dinosaurs, new timeline says
Earliest snake fossils provide evidence snakes evolved their flexible skulls before their long, limbless bodies.
- Chemistry
Sodium and other alkali explosions finally explained
A high-speed camera snaps sharp details of how alkali metals explode in water — a classic, but until now, not fully explained chemical reaction.
- Climate
Warming could nearly double rate of severe La Niña events
Changing climate in the western Pacific could roughly double the frequency of severe La Niña events that cause extreme weather shifts across the globe.
- Anthropology
Scans tell gripping tale of possible ancient tool use
South African fossils contain inner signs of humanlike hands, indicating possible tool use nearly 3 million years ago.
- Planetary Science
Rosetta reveals a complex comet
Rosetta finds diverse landscapes on comet 67P, which could provide researchers with clues about how the solar system formed.
- Genetics
Scientists find new way to corral genetically engineered bacteria
Engineering E. coli to depend on human-made molecules may keep genetically modified bacteria from escaping into nature.
- Neuroscience
Brain’s protective barrier gets leakier with age
Aging influences the breakdown of the blood-brain barrier, which may contribute to learning and memory problems later in life.
- Neuroscience
Newly identified brain circuit hints at how fear memories are made
A newfound set of brain connections appears to control fear memories, a finding that may lead to a better understanding of PTSD and other anxiety disorders.
- Physics
Speed of light not so constant after all
Even in vacuum conditions, light can move slower than its maximum speed depending on the structure of its pulses.
- Earth
Faulty thermometers exaggerated western U.S. mountain warming
Defective thermometers used in snowpack and ecology research overstated warming in western U.S. mountains.
- Animals
Mountain migration is a roller coaster for bar-headed geese
Bar-headed geese rise and fall to match terrain below them when migrating over the Himalayas.
