- Science News: Columbus Blamed For Little Ice Age
Here's a fun theory of the origin of the Little Ice Age, lasting from around 1550–1850: that massive losses of New World population, as a result of disease spread by explorers, resulted in reforestation of huge swaths of the Americas, removing billions of tons of CO2 from the atmosphere, decreasing its capacity to hold heat. The theory itself isn't new—it was first proposed six years ago—but this new theory is based on a combination of evidence that CO2 levels dropped then and archeological evidence that charcoal accumulation plummeted during the period, evidence that the smaller populations weren't burning trees to clear land for crops. No doubt the link between exploration and climate would have struck people as impossible at the time. Kind of like how many Republicans will feel about it now.
- LA Times: Dietary supplements linked to higher risk of death in older women
A longitudinal study published in the Archives of Internal Medicine has found that women who take multivitamins regularly die younger than those who do not. Of all of the supplements studied (B6, folic acid, magnesium, zinc, copper, iron, and more), only calcium appeared to lower the risk of death. More and more data show that supplements simply aren't useful, save for to compensate for a shortage resulting from a health problem, and prescribed by a doctor.
- AP: Nearly half of US households escape fed income tax
Republicans are complaining about how 46% of Americans pay no income tax, despite that the fact that half of them make no payments because of income tax cuts that Republicans championed and, in many cases, enacted. (The other half have little to no income, which makes criticism of their lack of payments particularly heartless.) "I'm so angry that my agenda has been enacted!"