


Bird flu viruses may infect mammary glands more commonly than thought

A heat dome is baking the United States. Here’s why that’s so dangerous

The universe may have a complex geometry — like a doughnut

Astronomers watch a supermassive black hole turn on for the first time

Some people have never gotten COVID-19. An obscure gene may be why

50 years ago, the sun’s influence on Earth’s lightning was revealed

Scientists developed a sheet of gold that’s just one atom thick

Human spaceflight’s new era is fraught with medical and ethical questions
