Customers may grumble about having to pay fees for everything on an airplane, American airport security and a la carte pricing has certainly turned travel into a third world experience, but a new analysis has found that checked baggage fees have improved the biggest aspect of flying - getting to a destination on time.

"Because passengers changed their behavior, less weight went into the plane below the cabin," said Mazhar Arikan, a University of Kansas assistant professor in their business school. "This offset any changes in carry-on luggage, and it helped airlines improve their on-time departure performance. The below-the-cabin effect dominates the above-the-cabin effect."

CHARLOTTESVILLE, VA (AUGUST 23, 2016). Seventy percent of football players in the US are youths 9 to 14 years of age, yet most data on head impacts sustained in this sport have been from high school, college, and professional football players. This makes it difficult to make informed decisions on how best to structure practices and games to protect younger players from concussion. A new study reported in the Journal of Neurosurgery: Pediatrics will hopefully change that. It focuses on these younger players and the head impacts they sustain throughout the football season and offers suggestions to reduce the risk of high-magnitude head impacts.

In a very severe, genetic form of microcephaly, stem cells in the brain fail to divide, according to a new Columbia University Medical Center study that may provide important clues to understanding how the Zika virus affects the developing brain.

The study was published August 24 in Nature Communications.

Due to the Zika virus, the world is suffering from its first known epidemic of microcephaly, a devastating brain developmental condition that substantially reduces the number of neurons in the brain, along with brain size and function at birth.

Bacteria that cause tuberculosis, leprosy and other diseases, survive by switching between two different types of metabolism. EPFL scientists have now discovered that this switch is controlled by a mechanism that constantly adapts to meet the bacterium's survival needs, like a home's thermostat reacting to changes in temperature.

When we go hungry, we have the ability to ignore the urge to eat such that we can carry out the task at hand. It has long been known that the brain is involved in such decisions. But how the brain coordinates the response to nutritional stress so that the body can function normally is not understood very well. Now, researchers from the National Centre for Biological Sciences (NCBS), Bangalore, have discovered a brain circuit that allows fruit flies to take a major developmental step in their lives despite nutritional stress.

Fertility experts are calling on the companies who make the solutions in which embryos are cultured during in vitro fertilisation (IVF) to give a clear list of ingredients following publication of a trial that shows that the composition of these laboratory cultures affects the outcomes of the resulting embryos and babies.

The first randomised controlled trial (RCT) to look at the effect on perinatal outcomes of different IVF culture media found that they affected the numbers of viable embryos created, the rates of successful implantation in the womb, the pregnancy rates and the babies' birthweights.