New results from Dark Energy Spectroscopic Instrument hint that the influence of mysterious force driving universe's accelerating expansion may change over time.

Astronomers studying the largest-ever map of the cosmos have found hints that our best understanding of the universe is due a major rewrite.The analysis, which looked at nearly 15 million galaxies and ...

According to an alternative model of how intelligent life emerges on planets like Earth, the existence of aliens—and human ...

Caltech researchers have mathematical evidence suggesting a Neptune-sized Planet X may exist deep in the solar system in an orbit far beyond Pluto. Planet X could have a mass about 10 times that of ...

Physicist Alan Guth, the father of cosmic inflation theory, describes emerging ideas about where our universe comes from, what else is out there, and what caused it to exist in the first place.

Red shift data provides evidence that the Universe, including space itself, is expanding. The discovery of the CMBR, after it had been predicted by the theory, provided very strong support for the ...