ScienceDaily Environment Headlines
for Sunday, November 2, 2008
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Sea Urchin Yields Key Secret Of Biomineralization (November 1, 2008) -- The teeth and bones of mammals, the protective shells of mollusks, and the needle-sharp spines of sea urchins and other marine creatures are made-from-scratch wonders of nature. ... > full story
Inland Ants Often Prefer Salt Over Sugar, Implying Salt May Be A Limitation On Their Activity (November 1, 2008) -- Mammals are limited by the availability of salt, and now researchers have shown that ants are too. In experiments in North, Central and South American, researchers have shown that plant-eating and omnivorous ants living more than 60 miles inland are more interested in salt than sugar, with the preference greater the farther they live from the coast. Carnivorous ants show no such preference. ... > full story
Grapes And Grape Extracts May Lower Cardiovascular Disease Risk, Review Article Suggests (November 1, 2008) -- A growing body of research data suggests that consuming foods rich in polyphenols from grapes, including red wine, helps reduce the risk of heart disease, according to a review article in Nutrition Research. ... > full story
Ancient Mummy, The Tyrolean Iceman, Has No Modern Children (November 1, 2008) -- Researchers have revealed the complete mitochondrial genome of one of the world's most celebrated mummies, known as the Tyrolean Iceman or Ötzi. The sequence represents the oldest complete DNA sequence of modern humans' mitochondria. It is highly unlikely that the Iceman has any modern day relatives, according to researchers. ... > full story
Soft Rubber Harness Enables Researchers To Study Leatherback Turtles In Captivity For Years (November 1, 2008) -- A Canadian researcher has pioneered a soft rubber harness and a recipe that enabled him to raise and study leatherback turtles in captivity for more than two years -- a feat only one other team of scientists have achieved. ... > full story
Wildflower Declines In Thoreau's Concord Woods Are Due To Climate Changes (November 1, 2008) -- Drawing on records dating back to the journals of Henry David Thoreau, scientists have found that different plant families near Walden Pond have borne the effects of climate change in strikingly different ways. Some of the plant families hit hardest by global warming have included beloved species like lilies, orchids, violets, roses, and dogwoods. ... > full story
Conditions That Initiate Erosion Identified (November 1, 2008) -- Engineers have demonstrated that sustained spikes in turbulence are responsible for dislodging particles, whether on land or in the water. ... > full story
New Model Predicts A Glacier's Life (October 31, 2008) -- Researchers have developed a numerical model that can re-create the state of Switzerland's Rhône Glacier as it was in 1874 and predict its evolution until the year 2100. This is the longest period of time ever modeled in the life of a glacier, involving complex data analysis and mathematical techniques. The work will serve as a benchmark study for those interested in the state of glaciers and their relation to climate change. ... > full story
Extinct Sabertooth Cats Were Social, Found Strength In Numbers, Study Shows (October 31, 2008) -- The sabertooth cat, one of the most iconic extinct mammal species, was likely to be a social animal, living and hunting like lions today, according to new scientific research. The species is famous for its extremely long canine teeth, which reached up to seven inches in length and extended below the lower jaw of the cat. ... > full story
Over-use Of Organic Fertilizers In Agriculture Could Poison Soils, Study Finds (October 31, 2008) -- Excessive doses of organic residues in agricultural fields could be dangerous for plants, invertebrates and micro-organisms living in the soil. This is the finding of a new study that shows that the use of appropriate levels of fertilizers would prevent this toxic impact on the soil biota. ... > full story
By Imaging Live Cells, Researchers Show How Hepatitis C Replicates (October 31, 2008) -- The hepatitis C virus is a prolific replicator, able to produce up to a trillion particles per day in an infected person by hijacking liver cells in which to build up its viral replication machinery. Now new research -- in which scientists have for the first time used fluorescent proteins to image hepatitis C virus replication in live cells -- shows that the microscopic viral factories are a diverse mix of big, immobile structures and tiny replication complexes that zip zanily around inside the cell. ... > full story
In Decision To Grow, Bacteria Follow The Crowd (October 31, 2008) -- When it comes to the decision to wake up and grow, bacterial spores "listen in" to find out what their neighbors are doing and then they follow the crowd, according to a new report. ... > full story
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