For nearly 25 years, we thought we knew how the Universe would end. Now, new measurements point to a profoundly different conclusion.
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The Fermi paradox (along with the subsequent Drake equation) is so difficult that even brilliant thinkers can make little dent in it.
The quantum world — and its inherent uncertainty — defies our ability to describe it in words.
An enormous amount of antimatter is coming from our galactic center. But the culprit probably isn’t dark matter, but merely neutron stars.
Along with gravitational lensing and ALMA’s incredible long-wavelength spectroscopy, JWST is reshaping our view of the early Universe.
It’s been 100 years since we discovered that the Universe was expanding. But if it’s expanding, then what is it expanding into?
It’s not only the gravity from galaxies in a cluster that reveal dark matter, but the ejected, intracluster stars actually trace it out.
Perhaps we should be searching for “other Mercurys” rather than “other Earths.”
The observable Universe is 92 billion light-years in diameter. These pictures put just how large that is in perspective.
The hot Big Bang is often touted as the beginning of the Universe. But there’s one piece of evidence we can’t ignore that shows otherwise.
The strongest tests of curved space are only possible around the lowest-mass black holes of all. Their small event horizons are the key.
In paint form, the world’s “whitest white” reflects so much light that surfaces become cooler than the surrounding air.
The structure of our Solar System has been known for centuries. When we finally started finding exoplanets, they surprised everyone.
The first tests of optical communications far from Earth will take place aboard the asteroid-bound Psyche spacecraft
Science is for everyone, even those possessing strongly held beliefs that seem to conflict with the best available evidence.
Einstein’s relativity teaches us that time isn’t absolute, but passes relatively for everyone. So how do telescopes see back through time?
You would think that with all our technology, like the James Webb Space Telescope, we would know how big the Universe is. But we don’t.
For thousands of years, we puzzled at how far away the Moon was. Today we know its distance, at any time, to within millimeters.
Practically all of the matter we see and interact with is made of atoms, which are mostly empty space. Then why is reality so… solid?
Don’t worry that your dog’s world is visually drab.
Dark energy is one of the biggest mysteries in all the Universe. Is there some way to avoid “having to live with it?”
The new electrically conductive substrate could be the future of hydroponic farming.
Massive objects like black holes, stars, and rogue planets routinely pass near our Solar System. An ensuing comet storm could destroy us.
Ever since the Big Bang, cataclysmic events have released enormous amounts of energy. Here’s the greatest one ever witnessed.
Archaeologists have identified what may be Europe’s oldest human-made megastructure.
If the Universe is expanding, and the expansion is accelerating, what does that tell us about the cause of the expanding Universe?
The galactic center is home to the most powerful engine in the Milky Way: a supermassive black hole. How does its energy ultimately escape?
Amyloid plaque can build up in body organs other than the brain. The resulting diseases — AL amyloidosis, ATTR amyloidosis and more — cause much suffering.
Two fundamentally different ways of measuring the expanding Universe disagree. What’s the root cause of this Hubble tension?