Health Mind & Brain

Neuroscientists identify a surprising low-tech fix to the problem of sleep-deprived teens

Neuroscientists identify a surprising low-tech fix to the problem of sleep-deprived teens

Healthy sleep leads to healthy brains. Neuroscientists have gotten that message out. But parents, doctors and educators alike have struggled to identify what to do to improve sleep. Some have called for delaying school start times or limiting screen time before bed to achieve academic, health and even economic gains.

Human evolution is still happening – possibly faster than ever

Human evolution is still happening – possibly faster than ever

Modern medicine’s ability to keep us alive makes it tempting to think human evolution may have stopped. Better healthcare disrupts a key driving force of evolution by keeping some people alive longer, making them more likely to pass on their genes. But if we look at the rate of our DNA’s evolution, we can see that human evolution hasn’t stopped – it may even be happening faster than before.

Could consciousness all come down to the way things vibrate?

Could consciousness all come down to the way things vibrate?

Why is my awareness here, while yours is over there? Why is the universe split in two for each of us, into a subject and an infinity of objects? How is each of us our own center of experience, receiving information about the rest of the world out there? Why are some things conscious and others apparently not? Is a rat conscious? A gnat? A bacterium?

Meet the trillions of viruses that make up your virome

Meet the trillions of viruses that make up your virome

If you think you don’t have viruses, think again. It may be hard to fathom, but the human body is occupied by large collections of microorganisms, commonly referred to as our microbiome, that have evolved with us since the early days of man. Scientists have only recently begun to quantify the microbiome, and discovered it is inhabited by at least 38 trillion bacteria. More intriguing, perhaps, is that bacteria are not the most abundant microbes that live in and on our bodies. That award goes to viruses.

Plant-rich diets may help prevent depression – new evidence

 Plant-rich diets may help prevent depression – new evidence

Being depressed can negatively affect your appetite and what you eat, but can bad eating habits bring your mood down? Our latest study, a systematic review of the best available evidence, found a clear link between the quality of a person’s diet and their risk of depression. And it goes beyond the effect of diet on body size or other aspects of health that can affect mental health. 

Five popular hangover cures, reviewed by experts

Five popular hangover cures, reviewed by experts

It’s a common misconception that hangovers are mainly the result of dehydration. An evening of heavy drinking can lead to inflammation of the stomach and intestines, poor-quality sleep and the production of toxic substances that lead to vomiting, sweating and an increased heart rate. Research also suggests that hangovers can hamper the ability to concentrate and remember information.

Deciphering how memory works in the brain – at the level of individual cells

Deciphering how memory works in the brain – at the level of individual cells

Say you meet an old friend at the train station. She is standing about a metre ahead of you, and on the tracks to your right a train has just pulled into the station. Behind your friend you see a bakery. We often remember such scenes in vivid detail. But exactly how we do that by forming mental images has long been a bit of a mystery.

Close-Up View of DNA Replication Yields Surprises

Close-Up View of DNA Replication Yields Surprises

Almost all life on earth is based on DNA being copied, or replicated, and understanding how this process works could lead to a wide range of discoveries in biology and medicine. Now for the first time scientists have been able to watch individual steps in the replication of a single DNA molecule, with some surprising findings. For one thing, there’s a lot more randomness at work than has been thought.

I can’t sleep. What drugs can I (safely) take?

I can’t sleep. What drugs can I (safely) take?

If you’re having trouble sleeping, medicines shouldn’t be your first option. Exercise regularly, cut back on coffee (and other caffeinated drinks) after midday, eat less in the evening, ease up on “screen time” before, and in, bed, practice meditation and try to have a quiet, dark bedroom dedicated mostly to sleep.