The solar system sits inside a vast pocket of hot, thin gas. However, that nearby structure has never looked especially simple.

I suspect these may be the people who believe in the idea of clutch performance in sports. I used to reflexively deny the existence of clutch. In fact, clutch, as it is commonly used, runs counter to ...

For nearly a century, astronomers have known that the universe is expanding. In the late 1990s, two independent teams, the ...