Two fundamentally different ways of measuring the expanding Universe disagree. What’s the root cause of this Hubble tension?
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University College London professor Brian Klaas exposes the ugly truth about world leaders.
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The last 70 years have taken us farther than the previous 70,000. But can we accomplish more than creating a record saying, “We were here?”
Life became a possibility in the Universe as soon as the raw ingredients were present. But living, inhabited worlds required a bit more.
The cosmic scales governing the Universe are almost unbelievably large. What if we shrunk the Sun down to be just a grain of sand?
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 perfectly accessible, perfectly knowable Universe of classical physics is gone forever, no matter what interpretation you choose.
Neuroscientist and author Bobby Azarian explores the idea that the Universe is a self-organizing system that evolves and learns.
The first stars in the Universe were made of pristine material: hydrogen and helium alone. Once they die, nothing escapes their pollution.
You can only create or destroy matter by creating or destroying equal amounts of antimatter. So how did we become a matter-rich Universe?
The Universe is an amazing place. Under the incredible, infrared gaze of JWST, it’s coming into focus better than ever before.
In our Universe, matter is made of particles, while antimatter is made of antiparticles. But sometimes, the physical lines get real blurry.
Some constants, like the speed of light, exist with no underlying explanation. How many “fundamental constants” does our Universe require?
How do physicists solve a problem like entropy?
One study suggested that the “Methuselah Star” is older than the Universe itself.
Is the Universe finite or infinite? Does it go on forever or loop back on itself? Here’s what would happen if you traveled forever.
Some physicists are besot with the multiverse, but if we can’t detect these other universes, how seriously should we take them?
Early relics and late-time objects give incompatible results for the expanding Universe. This independent anomaly intensifies the problem.
Most of us have heard that the Sun is an ordinary, typical, unremarkable star. But science shows we’re actually anything but average.
Early on, only matter and radiation were important for the expanding Universe. After a few billion years, dark energy changed everything.
For many years, cosmologists have claimed the Universe is 13.8 billion years old. A new paper says no, it’s 26.7 billion. How do we decide?
If the evolution of the Universe is a movie, what happens when we rewind it all the way backward?
This oddball system of three stars might be our best chance at finding nearby life in the Universe.
That scary swirling void from which nothing can escape is our perfect universal translation tool.
Headlines have blared that quasar ticking confirms that time passed more slowly in the early Universe. That’s not how any of this works.
In a far-reaching discovery with astrophysicist Karolina Garcia, we discuss what’s in the Universe and how it grew up.
Holograms preserve all of an object’s 3D information, but on a 2D surface. Could the holographic Universe idea lead us to higher dimensions?
Even with the quantum rules governing the Universe, there are limits to what matter can withstand. Beyond that, black holes are unavoidable.
The first elements in the Universe formed just minutes after the Big Bang, but it took hundreds of thousands of years before atoms formed.
Total eclipses are a product of a strange and almost eerie cosmic coincidence — one that makes Earth an even rarer world in the galaxy and, by proxy, in the Universe.