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Two parts of our Universe that seem to be unavoidable are dark matter and dark energy. Could they really be two aspects of the same thing?

It is time to give the Russian cosmologist the credit he deserves.

This afternoon, the Supreme Court agreed to hear argument in two same-sex marriage cases: a challenge to the U.S. 9th Circuit Court of Appeals decision to overturn Proposition 8 and […]

In response to a growing number of visitors along with recent city ordinances restricting or eliminating on-street parking, some parking garage owners are turning to smartphone technology.

Einstein’s general relativity has reigned supreme as our theory of gravity for over a century. Could we reduce it back down to Newton’s law?

First discovered in the mid-1960s, no cosmic signal has taught us more about the Universe, or spurred more controversy, than the CMB.

An evidence-based policy movement is arming the fight with tools and programs that are more effective than ever before.

For nearly 60 years, the hot Big Bang has been accepted as the best story of our cosmic origin. Could the Steady-State theory be possible?

Since the mid-1960s, the CMB has been identified with the Big Bang’s leftover glow. Could any alternative explanations still work?

Almost everyone asserts that the Big Bang was the beginning of everything, followed by inflation. Has everyone gotten the order wrong?

Today, the deepest depths of intergalactic space aren’t at absolute zero, but at a chill 2.73 K. How does that temperature change over time?

In all directions, at great distances, the Universe looks younger, more uniform, and less evolved. Does that mean Earth must be the center?

The Universe isn’t just expansion, but the expansion itself is accelerating. So why can’t we feel it in any measurable way?

The Universe is 13.8 billion years old, going back to the hot Big Bang. But was that truly the beginning, and is that truly its age?

Many contrarians dispute that cosmic inflation occurred. The evidence says otherwise.

The big question isn’t whether the Universe is expanding at 67 or 73 km/s/Mpc. It’s why different methods yield such different answers.

While the concept stretches back centuries, it has garnered significant attention in recent decades.

Just 13.8 billion years after the hot Big Bang, we can see objects up to 46.1 billion light-years away. No, this doesn’t violate relativity.

“Isn’t it enough to see that a garden is beautiful without having to believe that there are fairies at the bottom of it too?”

The Universe is precisely dated at 13.8 billion years old, but astronomers claim the Methuselah star is 14.5 billion years old. What gives?

The mutual distance between well-separated galaxies increases with time as the Universe expands. What else expands, and what doesn’t?

The evidence that the Universe is expanding is overwhelming. But how? By stretching the existing space, or by creating new space itself?

In general relativity, white holes are just as mathematically plausible as black holes. Black holes are real; what about white holes?

From the earliest stages of the hot Big Bang (and even before) to our dark energy-dominated present, how and when did the Universe grow up?

Dark energy is one of the biggest mysteries in all the Universe. Is there any way to avoid “having to live with it?”

In the 20th century, many options abounded as to our cosmic origins. Today, only the Big Bang survives, thanks to this critical evidence.

The Universe is expanding, and the Hubble constant tells us how fast. But how can it be a constant if the expansion is accelerating?

Yes, the Universe is expanding, but if you’ve ever wondered, “How fast is it expanding,” the answer isn’t in terms of a speed at all.

The Universe is 13.8 billion years old, going back to the hot Big Bang. But was that truly the beginning, and is that truly its age?

The “first cause” problem may forever remain unsolved, as it doesn’t fit with the way we do science.