Previous studies of hair loss have identified signals from the skin that help prompt new phases of hair growth and a new study reveals a new way to spur hair growth. 

Artist’s impression shows a sunset seen from the super-Earth Gliese 667 Cc. The brightest star in the sky is the red dwarf Gliese 667 C, which is part of a triple star system.

Today is the day when a whole lot of people will be exchanging gifts that don't fit or they don't want, and maybe buying something they did want.

It's the perfect time to think about gift exchanges. Gift exchanges can reveal how people think about others, what they value and enjoy, and how they build and maintain relationships. Researchers are exploring various aspects of gift-giving and receiving, such as how givers choose gifts, how gifts are used by recipients, and how gifts impact the relationship between givers and receivers. 

The insanity defense is often an option of last resort rather than a lenient alternative to imprisonment. Douglas LeMoine

By Meron Wondemaghen, University of New England

The cost of a degree just keeps rising. Is it still worth it? Shutterstock

By Robert Reich, University of California, Berkeley

The early admissions deadlines for universities across the country have come and gone, and acceptance letters are on their way. But with the cost of a four-year college education rising an average of 5% a year, many students and parents are likely wondering whether the cost of a degree is worth it.

 Edentulism, the absence of teeth, has evolved on multiple occasions within vertebrates including birds, turtles, and a few groups of mammals such as anteaters, baleen whales and pangolins, but where early birds are concerned, the fossil record is fragmentary.

A question that has intrigued biologists is whether teeth were lost in the common ancestor of all living birds or convergently in two or more independent lineages of birds.

A research team using the degraded remnants of tooth genes in birds to determine when birds lost their teeth believes that teeth were lost in the common ancestor of all living birds more than 100 million years ago.

Enzymes are crucial for assisting virtually all biological processes, but there has been little consensus on how they work. Molecular processes crucial to life are made possible by these but beyond that less is known. 

Chemists looking inside a working enzyme have found that local electric fields focused at the active site might play a big role in helping it accelerate reactions. The electrostatic field within an enzyme accounts for the lion's share of its success, they conclude.

A woman sniffs a glass of wine during a tasting event in Beijing. Reuters

By Pierre Ly, Puget Sound University and Cynthia Howson, University of Washington

China’s wine industry has exploded in recent years, with the number of wineries more than doubling over the past decade, propelling the country past Australia to become the world’s 7th-largest producer. What is driving this fast-paced growth and is the quality of Chinese wine improving?

Internet addiction, an impulse-control problem marked by an inability to inhibit Internet use, can adversely affect a person's life, including their health and interpersonal relationships. The prevalence of Internet addiction varies among regions around the world, as shown by data from more than 89,000 individuals in 31 countries analyzed for a study published in Cyberpsychology, Behavior, and Social Networking.

The Greeks hailed Dionysus (also known as Bacchus) as their patron god of wine, said to provide ecstasy and spiritual vision to his devotees. Pictured is Caravaggio's 1595 masterpiece Bacchus. Wikimedia

By Robert Fuller, Bradley University