Welcome to the age of precision cosmology, a scientific era in which astronomers and physicists have measured almost everything about our universe—except for its deepest mysteries: dark matter and ...

The largest digital camera ever built is beginning to capture images of unseen corners of the universe in finer detail. The ...

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Calculating the total mass of the universe is not simple, because most of the mass is invisible. In a pie chart of the contents of the universe, only 5 percent is normal matter, atoms that make up all ...

Only about 5% of the universe is composed of normal matter that we can directly observe, while the remaining 95% is widely believed to consist of dark matter and dark energy. Paradoxically, however, ...

Two recent studies by Professor Stefano Profumo at the University of California, Santa Cruz, propose theories that attempt to answer one of the most fundamental open questions in modern physics: What ...

The universe may not only be geometry and energy—but also memory. And in that memory, every moment of cosmic history may still be written. For more than a century, physics has been built on two great ...

Baryons are found in all of the visible matter in the universe but not in the mysterious dark matter that exerts gravitational pull but does not interact with light. In the 1990s, scientists analyzed ...

For more than a century, physics has been built on two great theories. Einstein’s general relativity explains gravity as the bending of space and time. Quantum mechanics governs the world of particles ...

The universe is dead; long live the universe. Not right at this moment, not yet. But one day everything we know will be gone. The cities we build, the lakes we swim in, the planet we live on, the ...