It is a weekly event in epidemiology - some medical or health outcome is linked to socioeconomic inequality, as if more spending makes people healthy.

In America, and to a much less extent in Europe, there can be a lot of angst when an aerospace engineer wears the wrong shirt on television. Women have a great deal of power in western nations, so much so that they can overwhelm science breakthroughs with cultural Gerrymandering.

We like to think of evolution as a fine-tuning process, one that whittles away genetic imperfections and redundancies and converges on a more efficient system because of 'survival of the fittest'.

But natural selection is just one mechanism of evolution and what is fittest at one point may not have been fittest at another, yet could still be inherited. Our bodies are full of parts that we inherited and either don't work anymore or are rather buggy and other parts have simply found a way to make work.

Increasing the amount of omega-3s in your diet will likely decrease your risk of getting heart disease, according to Penn State nutritionists who cite evidence supporting the heart-health benefits of eicosapentaenoic acid and docosahexaenoic acid (EPA and DHA), marine-derived omega-3 fatty acids.

Empires have risen and fallen and often it has been due to changes in the climate. When agriculture was a more demanding endeavor people wanted the most fertile lands and as that shifted, so did cities.

For that reason, climate change has often been cited as the most logical reason for a huge population collapse in Europe at the end of the Bronze Age. Now archaeologists and environmentalists say they can prove definitively that climate change could not have been the culprit. Because the changes in climate that scientists believed to coincide with the fall in population in fact occurred at least two generations later.

"Dark matter" is a blanket term for inferred matter that is undetected but must exist in order for gravity at very large scales to make any sense at all.

Based on inference, 27 percent of the universe is generally acknowledged to be dark matter, even though it is not visible and eludes direct detection and measurement. Whatever dark energy might turn out to be gets a number of about 68 percent of the universe. The rest of the universe, what we can detect and feel, is what we know to be matter.