Latest Biology & Health News

Forget the headlines about designer babies for a minute. Here's what actually happens at the molecular level when Cas9 finds, unzips, and cuts a strand of DNA.

Antibiotics transformed medicine. Used right, they cure deadly infections in days. Used wrong, they're driving one of the biggest health threats we face. Here's how they really work.

Sugar has been blamed for everything from obesity to cancer to Alzheimer's. The reality is more nuanced — quantity, source, and context all matter. Here's what nutrition science actually shows.

About 1 in 7 people worldwide live with a mental disorder. The biology is real but incompletely understood, and several effective treatments exist. Here is what the evidence supports.

DNA is the instruction manual for every living thing. Here's how its four-letter code builds proteins, copies itself, and passes traits from parent to child — explained in plain language.

Your gut and brain exchange signals through nerves, immune cells, and microbial chemicals. Here is what animal and human studies show about mood, anxiety, and cognition, and where the evidence is still thin.

Exercise is the closest thing we have to a wonder drug. Here's how it actually changes your body and brain — and the realistic minimum that gives you most of the benefit.

Intermittent fasting works for some people for some reasons. Here's the actual research on what it does, what it doesn't, and how it compares to ordinary calorie restriction.

Yawning is one of the most universal human behaviours, and one of the most poorly understood. Multiple theories compete; none is fully accepted. Here's what science actually knows.

Photosynthesis takes sunlight, water, and CO₂ and produces sugar and oxygen. It powers nearly every food chain on Earth — and it produced the air you're breathing right now.

Caffeine is the world's most consumed psychoactive drug. It boosts alertness, has real health benefits, and is dangerous in excess. Here's the science of caffeine and how much you can safely drink.

The fitness industry says you need 1g per pound of body weight. Public health agencies recommend much less. Here's what the actual evidence says about protein requirements.