The makeup of the Earth's lower mantle, which makes up the largest part of the Earth by volume, is significantly different than previously thought.

Researchers have devised a new way to separate cells by exposing them to sound waves as they flow through a tiny channel.

Separating cells with sound offers a gentler alternative to existing cell-sorting technologies, which require tagging the cells with chemicals or exposing them to stronger mechanical forces that may damage them.
Their device, about the size of a dime, could be used to detect the extremely rare tumor cells that circulate in cancer patients' blood, helping doctors predict whether a tumor is going to spread.

In the 14th century, Venice was in many ways still a world power in its own right. The days when it could topple kingdoms using commerce were behind it, but it was still an important trade destination. In that period, trade meant ports and ports meant the Bubonic Plague in 1347.

When it hit, some tried prayer, some tried hunting vampires, but then officials quickly began to utilize what we would now call resilience management: rather than trying to target a poorly understood risk, state authorities focused on managing physical movement, social interactions, and data collection for the city as a system.

Dsillusioned churchgoers may find it increasingly difficult to remain associated with their church, yet many also find it difficult to leave.  They have not only a moral identity crisis but deep identity crises as their most important relationships and beliefs are put at risk. 

The authors of a paper in the Journal of Consumer Research conducted interviews with people who identify as former churchgoers and asked them to reflect on their experiences in leaving the church and the challenges of constructing a new identity as they rejected church authority and its doctrines.

Do you feel sadder watching a documentary about war or a drama about a young person dying of cancer?

If you poll most people, they will say there are stronger emotional reactions when stories are based on true events rather than fiction, but a new analysis in the Journal of Consumer Research finds that is not so.

How did our ancestors raise so many kids, while modern parents struggle with the fast pace of life?

It's unclear, but to help solve such First World problems, many businesses now offer traditional caregiving services ranging from planning birthday parties to teaching children how to ride a bike. According to a new paper in the Journal of Consumer Research, by outsourcing traditional parental duties, modern-day parents feel they are ultimately protecting parenthood.

To determine the role of the marketplace in modern-day parenting, the authors conducted in-depth interviews with participants who varied in parenting views, practices, and challenges ranging from income to social class and the availability of help from immediate family.