Martian mystery explained
Researchers found that heating and cooling alone can create spiral patterns on Mars, contrary to previous theories. The model suggests that differential melting and refreezing cause the spirals' unique shape and spacing.
University of Arizona
Paleofire database puts fire-scar and charcoal data online
The International Multiproxy Paleofire Database merges tree-ring evidence and lake sediment records to study past fires, with over 450 tree-ring and 50 sediment-based records anticipated. Researchers aim to connect paleodata to modern data for forest management and climate change analysis.
Home on the RangeView
A new Web site allows users to compare greenness from one year to the next, between years, against a 14-year average and at two-week intervals. This information is invaluable for making long-term land management decisions, enabling natural resource managers to monitor vegetation dynamics through time and across landscapes.
Training for science teachers should focus on learning, not teaching strategies
Science teacher training should focus on understanding how students learn, rather than just teaching strategies. Recruiting talented undergraduate science majors as teachers can significantly improve the preparation of science educators.
Titan is ideal lab for oceanography, meteorology
Scientists plan to deploy the Huygens probe to study Titan's lakes, seas, and climate. The moon's thick atmosphere and liquid hydrocarbons will provide a unique environment to understand oceanographic processes and predict climate changes.
Distant quasars probe end of cosmic dark ages
A team of astronomers has discovered 13 distant quasars, providing valuable insights into the early universe. The most ancient quasars are thought to have formed right along with supermassive black holes, suggesting a rapid transition from the cosmic dark ages to the cosmic renaissance.
It's a stirring tale of bacteria
Researchers observed Bacillus subtilis bacteria moving through fluid in a coordinated pattern, creating swirls and jets that stir the fluid and may aid bacterial detection. The 'self-concentration' phenomenon has potential applications in biotechnology, particularly in mixing minute quantities of solutions.
Want a side of algae with that? Hawaiian farmers sell seaweed by the seashore
Researchers in Hawaii have developed a way to grow the complete life cycle of long ogo, an edible red seaweed, without needing to harvest starter plants from the ocean. The sustainable system for growing fresh long ogo is unique in the United States and provides additional income for 40 farmers.
Measuring perchlorate levels in lettuce
Researcher Charles Sanchez finds perchlorate in lettuce foliage, mainly in discarded frame and wrapper leaves. The study aims to assess the extent of perchlorate accumulation in soils and groundwater sources.
Brash western skylines younger than previously believed
A team of University of Arizona geoscientists found that movement along faults created huge blocks of rock, lifting them 9,000 feet into the air to form Tucson's skyline. This discovery challenges previous theories on mountain formation in the western United States.
UA astronomers report the widest lensed quasar
Astronomers have detected a lensed quasar more than twice as wide as any previously reported, offering insights into dark matter and its distribution. The discovery provides evidence for the presence of massive galaxy clusters, which can be used to study dark matter.
Old equation may shed new light on planet formation
University of Arizona researchers used Love's equation to calculate tidal deformation in various spheres, discovering that under specific conditions, the shape of a planet could change dramatically. This may have regulated the size of planets, preventing their formation.
Experiment Proves New Weather-Data Collecting Technique
Researchers using Global Positioning System (GPS) satellites have developed a new technique to collect unprecedented accurate weather data, every hour of the day, for anywhere on Earth. This breakthrough could lead to greatly improved weather forecasts within months.
Global Change Research Should Focus On Rainfall, Not Temperature
Experts argue that global change research should focus on predicting rainfall patterns rather than temperature changes. Changes in rainfall can have significant effects on human activities and structures, such as road design and agriculture. By prioritizing rainfall prediction, researchers can help mitigate severe floods and droughts.
Nutrition Study Reshapes Strategies For Athletes
A sports nutrition program has been adopted by top US women's heptathlon athletes, credited with improving performance and hydration. The program emphasizes fluid replacement and eating small, frequent meals to optimize fuel for high-intensity exercises.
Tides Recorded The Moon's Retreat From Earth, Shorter Earth Days
Researchers analyzed sediment layers deposited by tides to study the moon's retreat from Earth. The study found that a day on Earth was approximately 18 hours long 900 million years ago, with the moon moving away at a constant rate. The analysis also revealed changes in tidal patterns over time.
Theory Bolsters Search For Brown Dwarfs And Giant Planets
A new theoretical study reproduces actual observations of the confirmed brown dwarf Gliese 229 B, providing insights into its atmosphere and formation. The research helps accelerate searches for brown dwarfs and giant extrasolar planets, shedding light on their composition and formation processes.
Photos Reveal Human Impact On Grand Canyon During Past Century
A new study reveals the significant human impact on the Grand Canyon over the past century, with changes in plant distribution and debris flows being documented. The study, which used rephotography of historic images from the 1889-1890 Stanton Expedition, found stability mixed with large amounts of human-caused change.
Audiologists Test Breakthrough In Hearing Care For Children
Researchers are assessing the audiological and educational benefits of the DigiFocus, a revolutionary device that adjusts automatically to different noise levels. The study aims to show that children with hearing loss will benefit from this technology and accelerate their speech, language, and social development.