Is a person's race "fixed"? It seems not. Since race is a cultural construct, perceptions of race may shift as a result of changes to the perceiver's social goals and motivations, so it always seems a little silly for sociologists to do surveys or give Implicit Association tests and play with statistics and declare that X equals Y, but that is the state of the social sciences in the USA.

So psychologists have found, for example, that political ideology may influence the extent to which they see biracial individuals as being Black or White. Look for a lot more of this political ideology stuff since it is election season.

Banks have long expected that you should spend a third of your income on housing. Now humanities academics say that would help low-income families get optimal brain power for their children also. 

But don't overspend to try and get into a better neighborhood, they write, and we saw the disaster that 1960s subsidies brought to neighborhoods.

Four of the most common mosquito pesticides used along the east and Gulf coasts show little risk to juvenile hard clams and oysters, according to a NOAA study in Archives of Environmental Contamination and Toxicology.

The paper also determined that lower oxygen levels in the water, known as hypoxia, and increased acidification increased how toxic some of the pesticides were. Such climate variables should be considered when using these pesticides in the coastal zone, the study concluded.

Like breathing? Thank water. And the continents.

One of the greatest mysteries of evolution involves oxygen levels in the atmosphere. At various points throughout 4.5 billion years of geological history, carbon levels have been 10X what they are today, yet life pushed on. Today, oxygen concentration is 21% of the atmosphere. One of the biggest puzzles in geochemistry is how it went from trace amounts to just the right one.

More is often not better. In the old days, naive corporations believed that a product that was not harmful when used according to guidance could be overused and it was just a waste of money. Once DDT got banned in America because more was not better, companies got a little smarter about stressing smart application.

But in different regions and climates, the optimal amount of something like fertilizer can fluctuate. Helping farmers around the globe apply more-precise amounts of nitrogen-based fertilizer can even help combat climate change.

Understanding how clouds affect climate is been a difficult proposition, even for a difficult to understand field like climate science.

What controls the makeup of the low clouds that cool the atmosphere or the high ones that trap heat underneath? How does human activity change patterns of cloud formation?

New research in Science suggests we may be nudging cloud formation in the direction of added area and height - and there may be even be a new type. It seems that, in pre-industrial times, there was less cloud cover over areas of pristine ocean than is found there today.