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Sat, 13 Mar 10
Human cells exhibit foraging behavior like amoebae and bacteria
http://feeds.sciencedaily.com/~r/sciencedaily/~3/KL670azg0Dg/100311123622.htm
When cells move about in the body, they follow a complex pattern similar to that which amoebae and bacteria use when searching for food, researchers have found.

Sat, 13 Mar 10
New insight into brain's decision-making process
http://feeds.sciencedaily.com/~r/sciencedaily/~3/idj754tjNlY/100311123620.htm
The hippocampus, a part of the brain essential for memory, has long been known to "replay" recently experienced events. Previously, replay was believed to be a simple process of reviewing recent experiences in order to help consolidate them into long-term memory. However, new research shows the phenomenon of memory replay is much more complex, cognitive process that may help an animal maintain its internal representation of the world, or its cognitive map.

Sat, 13 Mar 10
Mars Dunes: On the Move?
http://feeds.sciencedaily.com/~r/sciencedaily/~3/gimNPGH5lls/100304184156.htm
New studies of ripples and dunes shaped by the winds on Mars testify to variability on that planet, identifying at least one place where ripples are actively migrating and another where the ripples have been stationary for 100,000 years or more.

Sat, 13 Mar 10
Effects of lifestyle and exposures are mirrored in blood gene expression
http://feeds.sciencedaily.com/~r/sciencedaily/~3/jSjRJowJNNU/100311202723.htm
A study by Norwegian and French researchers hopes to provide new understanding of how blood cells adjust gene expression in response to various clinical, biochemical and pathological conditions. The Norwegian Woman and Cancer postgenome study highlights numerous blood gene sets affected by one's physical condition, lifestyle factors and exposure variables.

Sat, 13 Mar 10
Prehistoric response to global warming informs human planning today
http://feeds.sciencedaily.com/~r/sciencedaily/~3/Sw_wCoFM0Q0/100310162831.htm
Since 2004, University at Buffalo anthropologist Ezra Zubrow has worked intensively with teams of scientists in the Arctic regions of St. James Bay, Quebec, northern Finland and Kamchatka to understand how humans living 4,000 to 6,000 years ago reacted to climate changes.

Sat, 13 Mar 10
Brain tumor's 'grow-or-go' switch discovered
http://feeds.sciencedaily.com/~r/sciencedaily/~3/1AXPSGR2yq0/100311151730.htm
High energy levels cause glioblastoma cells to proliferate; low levels cause them to grow less and to migrate. This study discovered that a molecule called miR-451 coordinates this grow-or-go behavior, which is closely linked to the cells' ability to invade and spread. Thus, the molecule might be a biomarker for predicting survival in patients with glioblastoma multiforme and may serve as a target to develop drugs to fight these tumors.

Sat, 13 Mar 10
Small dogs originated in the Middle East, genetic study finds
http://feeds.sciencedaily.com/~r/sciencedaily/~3/D-d77nS5Jq0/100223191924.htm
A genetic study has found that small domestic dogs probably originated in the Middle East more than 12,000 years ago. Researchers have traced the evolutionary history of the IGF1 gene, finding that the version of the gene that is a major determinant of small size probably originated as a result of the domestication of the Middle Eastern gray wolf.

Sat, 13 Mar 10
Exploiting the architecture of cancers may lead to their destruction
http://feeds.sciencedaily.com/~r/sciencedaily/~3/4jwwdbcqtnQ/100310162825.htm
To grow larger, solid tumors require a network of blood vessels to nourish them. Chemotherapy exploits these vessels to deliver toxic drugs, but is inefficient if the drugs cannot pass quickly enough from the bloodstream into the tumor. A new study describes a way of transiently making the tumor blood vessels leakier, allowing more efficient drug uptake. This work may ultimately enhance delivery of chemotherapies into tumor tissue.

Sat, 13 Mar 10
Plants discover the benefits of good neighbors in strategy against herbivores
http://feeds.sciencedaily.com/~r/sciencedaily/~3/yi-7LBjAId0/100309202931.htm
Scandinavian scientists have discovered that a species of tree defends itself from herbivore attack by using chemicals emitted by neighboring plants. The study reveals how species of Birch tree absorb chemical compounds from neighboring Marsh tea plants, Rhondodendron tomentosum, in a unique "defense by neighbor strategy."

Sat, 13 Mar 10
Best treatment for childhood epilepsy suggested by new research
http://feeds.sciencedaily.com/~r/sciencedaily/~3/60Og-qmiEq8/100312164655.htm
One of the oldest available anti-seizure medications, ethosuximide, is the most effective treatment for childhood absence epilepsy, according to initial outcomes.