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Does diet change iron levels in the brain?

New research links iron levels in the brain with diet, though the effects seem to differ for men and women.

To exercise more, seniors should sit less

Getting the recommended 150 minutes of moderate exercise each week may be challenging for some older adults, but researchers say that doesn’t mean they shouldn’t work at it.

People sent 7 million marijuana tweets in a month

Twitter is a marijuana-friendly place, according to a new analysis of every pot-related tweet sent during a one-month period in early 2014.

Bad stuff would happen if your brain didn’t cycle

A study with mice shows how the mammalian brain is able to maintain a constant state of up and down—while under anesthesia, during slow-wave sleep, or even amid calm wakefulness.

How emotion turns dull events into memories

It makes sense that we have strong memories from events that carry a lot of emotion—for example, 9/11 or the birth of a child.

Physicists observe gigantic molecules predicted in 1970

Scientists have experimentally observed for the first time a phenomenon in ultracold, three-atom molecules predicted by Russian theoretical physicist Vitaly Efimov in 1970.

Indigenous people measure carbon that satellites miss

Indigenous people govern about half of all remaining undeveloped land on the planet. New research with indigenous people in the Amazon suggests they may outperform satellites in measuring the true carbon storage potential of the rainforest.

‘Dimmer switch’ gives quasar a whole new look

Astronomers have identified for the first time a “changing look” quasar, a gleaming object in deep space that appears to have its own on-off switch.

Postpartum depression can start during pregnancy

Not all postpartum depression is the same. Researchers say there are three distinct subtypes based on symptoms, and it’s important for doctors to identify the specific type to tailor treatment.

Fish diet may protect baby’s brain from mercury

The benefits of eating fish may do more than just offset the risks of mercury exposure to unborn babies.

Men and women want even-steven relationships

A survey of unmarried, childless men and women between the ages of 18 and 32 in the United States shows most want to split responsibilities equally.

Rare case uncovers missing clue to Fragile X

Fragile X syndrome may not only be a problem of receivers in the brain letting in too much information.

People with autism have uniquely synched brains

In an effort to understand autism spectrum disorder (ASD), researchers have zeroed in on synchronization between different parts of the brain.

‘Lobster shell’ cancer is too stiff to spread

Instead of killing tumor cells outright, doctors are exploring a new anti-cancer strategy that subtly hardens the cells so they can’t invade new areas of the body.

Do your buddies know how long you’ll live?

A new study shows that your personality in your 20s can predict your lifespan. In addition, your close friends can probably recognize the relevant personality traits better than you can.

Hydrogel lets body build ‘mature’ blood vessels

Hydrogels can work like scaffold upon which cells can build tissue. Researchers have created a new version of a hydrogel that can be injected into an internal wound.

Multitasking, not Facebook, hurts freshman GPA

College freshmen who spend a lot of time on social media risk having a lower GPA, but the problem isn’t Facebook.

What does Greenland’s melt mean for sea levels?

As glacial ice melts, sea levels are likely to rise around the globe. How fast this will happen is uncertain, however. In the case of the Greenland Ice Sheet, the more temperatures increase, the faster the ice will melt, according to computer model experiments.

Penny-sized ankles hint first primates lived in trees

Newly-discovered ankle bone fossils smaller than a penny show that our earliest primate ancestors most likely lived in trees.

How the brain remembers to fear danger

It’s been long known that human survival depends a bit on something called “fight or flight.” How this alarm in our brain first goes off, and what other parts of the brain are mobilized to express fear—and remember to avoid danger in the future—have been less clear.