Popular Big Bang Theory character to return in new spin-off - He’s one of the sitcom’s most under-appreciated stars ...

Evidence supporting this theory includes the cosmic microwave background, a faint "echo" of the universe's early expansion that scientists can study in detail. While the Big Bang Theory is widely ...

The universe started expanding from a hot dense state known as the Big Bang. The universe still is expanding and ... These fossils are the evidence that our universe really is evolving. Yet the theory ...

A new theory published late last year is offering an explanation as to why our universe is expanding at an accelerating rate.

The widely accepted cosmological model begins with the Big Bang, followed by a rapid phase of inflationary expansion. This theory aligns well with observations of the cosmos such as the ...

If the Universe is expanding, then in the past it must ... And while the new pictures don’t challenge the Big Bang theory, they do mean there’s still plenty left to explain about how the ...

Astronomers have been confounded by recent evidence that the universe expanded at different rates throughout its life. New findings risk turning the tension into a crisis, scientists say.

Approximately 13.8 billion years ago, the universe originated from a singularity, swiftly expanding and cooling to create the ...

Dark energy is still a mystery, but powerful new telescopes are set to uncover clues. With NASA and ESA leading the charge, ...

In 1920, astronomers Harlow Shapley and Heber Curtis held a Great Debate. Shapley argued that the spiral nebulae were small and in the Milky Way, while Curtis took a more radical position that they ...

Physicist Alan Guth, the father of cosmic inflation theory, describes emerging ... Geographic Image Collection/Alamy Our universe began with a bang—a big bang. The explosion stretched the ...

In 1927, the year he got his PhD from MIT, LeMaitre proposed this theory, in which he stated that the expanding universe was the ... and named his theory "big bang." LeMaitre's ideas opened ...