Climate Change Only One Symptom Of A Stressed Planet Earth

Climate Change Only One Symptom Of A Stressed Planet Earth
In releasing its latest comprehensive report, the Intergovernmental Panel on Climate Change (IPCC) focuses an important spotlight on the current state of the Earth’s climate.

Climate change is just one of the many symptoms exhibited by a planet under pressure from human activities. "Global environmental change, which includes climate change, threatens to irreversibly alter our planet," says Kevin Noone, Executive Director of the International Geosphere-Biosphere Programme (IGBP).

Cassini Images Mammoth Cloud Engulfing Titan's North Pole

Cassini Images Mammoth Cloud Engulfing Titan's North Pole

A giant cloud half the size of the United States has been imaged on Saturn’s moon Titan by the Cassini spacecraft. The cloud may be responsible for the material that fills the lakes discovered last year by Cassini's radar instrument.

Cloaked by winter's shadow, this cloud has now come into view as winter turns to spring. The cloud extends down to 60 degrees north latitude, is roughly 2400 kilometers in diameter and engulfs almost the entire north pole of Titan.

Lipid Plays Big Role In Embryonic Development

Lipid Plays Big Role In Embryonic Development

A little-known lipid plays a big role in helping us grow from a hollow sphere of stem cells into human beings, researchers have found.

They found that in the first few days of life, ceramide helps stem cells line up to form the primitive ectoderm from which embryonic tissues develop, says Dr. Erhard Bieberich, biochemist at the Medical College of Georgia.

Brain's Reward Circuit Activity Ebbs And Flows With A Woman's Hormonal Cycle

Brain's Reward Circuit Activity Ebbs And Flows With A Woman's Hormonal Cycle

Fluctuations in sex hormone levels during women's menstrual cycles affect the responsiveness of their brains' reward circuitry, an imaging study at the National Institute of Mental Health (NIMH), a component of the National Institutes of Health (NIH), has revealed. While women were winning rewards, their circuitry was more active if they were in a menstrual phase preceding ovulation and dominated by estrogen, compared to a phase when estrogen and progesterone are present.

Human Genome Breakthrough Reported

Investigators from the Ludwig Institute for Cancer Research (LICR) and the University of California, San Diego (UCSD) have made a breakthrough in identifying functional elements in the human genome, according to a report published online today in Nature Genetics.

Scientists Find Why Conductance Of Nanowires Vary

Scientists Find Why Conductance Of Nanowires Vary

Ancient Climate Shifted Wildly

Ancient Climate Shifted Wildly

The transition from an ice age to an ice-free planet 300 million years ago was highly unstable, marked by dips and rises in carbon dioxide, extreme swings in climate and drastic effects on tropical vegetation.

"This is the best documented record we have of what happens to the climate system during long-term global warming following an ice age," said Isabel Montañez, professor of geology at the University of California, Davis, and lead author on the paper. But she added that these findings cannot be applied directly to current global warming trends.

Risk Of Preterm Birth Appears To Vary By Season; Women Who Conceive In Spring Are Most Vulnerable

Women who become pregnant in spring are more vulnerable to preterm birth than those who conceive in other seasons, according to researchers at the University of Pittsburgh. Results of a large study of such seasonal variation in preterm birth, or birth prior to 37 weeks gestation, are being presented at the 27th annual meeting of the Society of Maternal-Fetal Medicine, being held today through Saturday at the Hilton San Francisco and Towers in California.

Food-mood Connection: The Sad Are Twice As Likely To Eat Comfort Food

Also, read Scientific Blogging columnist Seth Robert's interview with Brian Wansink here.

Theoretical Modeling Brings New Understanding Of Self-Assembly Of 'Cell Skeletons'

Theoretical Modeling Brings New Understanding Of Self-Assembly Of 'Cell Skeletons'