In 1919, physicist Theodor Kaluza hypothesized that extra dimensions might solve some outstanding problems in physics. And ...

It’s always amazing, and more than a little humbling, when the universe reminds us that our “common sense” is provincial, ...

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 ...

Physicists explore whether the universe hides extra dimensions. These tiny, curled-up or warped dimensions could explain ...

For more than a century, physicists have suspected that the familiar three dimensions of space and one of time might be only ...

The geometry of space, the setting in which physical laws operate, may hold clues to some of the biggest unanswered questions in fundamental physics. The underlying structure of spacetime itself could ...

For more than a century, physicists have suspected that the familiar three dimensions of space might be only a small slice of ...

There is an important and unresolved tension in cosmology regarding the rate at which the universe is expanding, and ...

India’s scientific community has quietly handed the world one of its most intriguing puzzles: a massive, elegantly structured spiral galaxy that existed when the universe was barely 1.5 billion years ...