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In a development that could lead to faster and more effective toxicity tests for airborne chemicals, scientists from Rice University and Nano3D Biosciences have used magnetic levitation to grow some of the most realistic lung tissue ever produced in a laboratory.

In the new study, researchers combined four types of cells to replicate tissue from the wall of the bronchiole deep inside the lung.

In vitro laboratory tests have historically been conducted on 2-D cell cultures grown in flat petri dishes, but scientists have become increasingly aware that cells in flat cultures sometimes behave and interact differently than cells that are immersed in 3-D tissue.

A group of researchers say they have shown environmental toxicants can negatively affect as many as three generations of an exposed animal's offspring.

Washington State University scientists led by molecular biologist Michael Skinner says he  found reproductive disease and obesity in the descendants of rats exposed to the plasticizer bisephenol-A, or BPA, as well DEHP and DBP, plastic compounds known as phthalates. In the journal Reproductive Toxicology, they report the first observation of cross-generation disease from a widely used hydrocarbon mixture the military refers to as JP8.

 Stratasys Ltd., a manufacturer of 3D printers and production systems for prototyping and manufacturing, says that the "magic arms" WREX exoskeleton, designed by Nemours/Alfred l. duPont Hospital for Children, has been nominated for the Designs of the Year 2013 awards by London's Design Museum. 

While the cultural debate of nationalized health care is whether or not to let obese people and smokers die(1), a new paper in Spain says males are pressuring women to be thin and it is making females less happy.

The psychologists also contend that women who are not comfortable with their body perceive women with a normal body as a threat. Specifically, when these women see a "normal" body they experience feelings of displeasure and lack of control, since they feel they have not any control on their own body and cannot make it be as they want.

The sun has terrific energy potential but harnessing its electricity with silicon solar cells is too expensive; at times 10 times the price of coal energy it is fine for wealthier people but unrealistic in developing nations, where CO2 emissions are rising the fastest.

At least in America, CO2 emissions have dropped dramatically. The energy sector, the largest producer of CO2, is already back at early 1990s levels of emissions and the traditionally worst offender, coal, is at early 1980s levels.

CO2 is the primary greenhouse gas emitted by human activity. A simple way to measure climate sensitivity is to calculate how much the mean air temperature will rise if we were to double the level of overall CO2 emissions compared to the world's pre-industrialized level around the year 1750. If we continue to emit greenhouse gases at our current rate, estimates are that we risk doubling that atmospheric CO2 level in roughly 2050.