sciencealert.com / Page 6

Millions of people have a heart rhythm disorder called atrial fibrillation, which causes the heart's upper chambers or atria to beat chaotically rather than in a smooth, coordinated rhythm.

It would be tempting to assume there's nothing much of note happening on Mars, but that dusty rusty planet has a lot of interesting stuff going on.

Bacterial meningitis is once again in global headlines, with recent cases linked to the University of Otago in New Zealand and a fast-growing outbreak at the University of Kent in England.

Early signs of Alzheimer's disease may be hidden in the way a person speaks, but it's not yet clear which details of our diction are most critical for diagnosis.

When a virus jumps to humans from another species, it can seem like a supervillain bent on world domination - especially if it goes on to ignite a pandemic, as many zoonotic viruses have done in recent decades.

For decades, elite runners have travelled the world to train at high altitude.

Comb jellies - very simple, gelatinous creatures best-known for their hypnotic underwater light shows - first appeared in Earth's oceans around 550 million years ago.

Vitamin C is one of the most iconic nutrients in popular health culture, often credited with preventing colds, boosting immunity, and even fighting serious diseases.

Ancient humans were surprisingly creative, structured, and geometrical in their thinking some 60,000 years ago, according to some intricately engraved ostrich eggshells found across southern Africa.

Past studies have found that gut activity can have significant impacts on the brain, and vice versa.