Uncategorized
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19552
This article, on the deleterious effect of dams on coastal systems, contains a major conceptual error. It states that “another important cause of the ground sinking is the waning of sediment deposition by the Mississippi River.” But over the past 100 million years, the northern Gulf Coast region has been subsiding because of excessive sediment […]
- Earth
Muddy Waters
Even though human activities such as agriculture and deforestation are sending more sediment into streams and rivers, less of that material is reaching river deltas, a trend that exacerbates problems such as subsidence and coastal erosion.
- Chemistry
Boxes coated with citronella repel insects
A fragrant grass extract known as citronella oil may deter insects from infesting cartons of food.
- Earth
School buses spew pollution into young lungs
Children riding on school buses inhale heavy doses of diesel fumes, and reducing these emissions could be a cost-effective means of improving their health, a new study suggests.
- Anthropology
Coasting to Asia in the Stone Age
New genetic analyses of people from native island groups in Southeast Asia support the unconventional view that around 70,000 years ago, people living in Africa crossed the Red Sea and moved east along Asia's southern coast.
- Planetary Science
Saturnian moonscape
Planetary scientists have obtained their closest image yet of Epimetheus, one of Saturn's tiny moons.
- Health & Medicine
Insulin may trigger type 1 diabetes
Insulin itself may precipitate the body's autoimmune attack in people with type 1 diabetes.
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Vertebrates, insects share the stress
A key protein involved in animals' physiological responses to stress has carried out the same function since before any organism developed a backbone.
- Astronomy
Spotty neutron stars
Astronomers have for the first time discerned hot spots on the surfaces of neutron stars.
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Brain’s support cells, always on the go
Cells that leap into action when the brain is injured are constantly searching for signs of danger during their supposed resting period.
- Humans
When Fair Means Superb: Young scientists and engineers meet in international competition
A record 1,447 high school students from 45 countries shone their brightest in Phoenix last week as they competed at the Intel International Science and Engineering Fair.
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Memories for Life: War sparked enduring recollections
Danes who lived through the Nazi occupation of Denmark exhibit suprisingly accurate memories for factual information and personal experiences related to momentous events from World War II.
