Fred Schwaller

From athletes testing positive at the Olympics to waves of infection globally. What does the latest COVID data show, and should we take precautions?

A majority of teenagers in Europe, Central Asia, and Canada do not use condoms. Experts warn of rising risks of STIs and unwanted pregnancies.

Hundreds of thousands of people got HIV and/or hepatitis via infected blood transfusions, and people are still dying. What have we learned?

A review of 28 years of research has shown that mobile phones and wireless tech devices are not linked to increased risk of cancer.

Galaxies are much bigger than we originally thought, extending far out into deep space — so far that the Milky Way likely interacts with our closest neighbor, Andromeda.

Neuroscientists scanned the brain of a pregnant woman and captured a 'widespread reorganization' of her brain before, during and after pregnancy.

We think of memory as a reliable recording of our lives. But we also have false memories, often pieced together from communal experience.

Nobel Laureates capture the public's imagination. But how relevant are the prizes to young scientists in an era of global research? Copy link

PhD students in Sweden accessed mental-health services at increasing rates as their studies went on.

Originally approved to help with excess weight and obesity, the injectable Wegovy and its sibling-product Ozempic, which is for type 2 diabetes, have become synonymous with weight loss fads.