Physicist Richard Lieu first explored the idea that gravity could exist without mass—now he’s got a new cosmological model ...

Gravity pulls us to earth, a lesson you learn viscerally the first time you fall. Isaac Newton described gravity as a ...

"The new model can account for both structure formation and stability, and the key observational properties of the expansion of the universe at large." ...

Dr. Richard Lieu, a physics professor at The University of Alabama in Huntsville (UAH), a part of The University of Alabama ...

About half of the non-dark matter in the universe cannot be accounted for by stars and galaxies alone. Now, scientists say ...

Physicists have proposed a new model of space-time that may provide the 'first observational evidence supporting string ...

Researchers say they discovered observational evidence of string theory, which could turn everything we know about the ...

Astronomers may have found the long-missing half of the universe's regular matter—and it appears to have been right under our ...

First discovered in the 1990s, dark energy has come to feel like a familiar face of the cosmos. Astronomers first imagined ...

What is the other 95 percent? Dark Universe examines the invisible dark matter underlying galaxies that, together with dark energy, accounts for that other 95 percent of the universe’s total energy ...

By comparing it to observations of the very early universe and supernovae, they have been able to suggest that dark energy – the mysterious force propelling our universe’s expansion – is not ...

Scientists hypothesized that there must be some unknown “dark energy” in the universe that propels the universe ever outward, but as theoretical cosmologist Katie Mack states: “We can’t ...