At first, the universe was like a hot stew. Instead of carrots and potatoes, it had particles. As the soupy universe cooled, ...

The liquid outer core is surrounded by the thick layer called the mantle. It’s mostly solid rock, not melted like lava. Over time, changes in heat and pressure make the solid rock slowly flow. It’s ...

A rare gravitationally lensed supernova called SN 2025wny appears in five separate images due to the gravity of two ...

The surface of Earth is finite. We can measure it. If it was expanding, then its size would grow with time. And once again, good ol' Earth helps us understand what the universe might be doing beyond ...

Earth and the entire Milky Way galaxy might be sitting inside an enormous, mysterious void—a giant cosmic hole making our universe expand faster right here than anywhere else. This unusual idea, ...