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From how life emerged on Earth to why we dream, these unanswered questions continue to perplex scientists.
Holograms preserve all of an object’s 3D information, but on a 2D surface. Could the holographic Universe idea lead us to higher dimensions?
In general relativity, white holes are just as mathematically plausible as black holes. Black holes are real; what about white holes?
Mars and Earth were sister planets in many ways, with early similar conditions. Why did Mars die? The leading explanation isn’t universal.
The great hope is that beyond the indirect, astrophysical evidence we have today, we’ll someday detect it directly. But what if we can’t?
Unless you confront your theory with what’s actually out there in the Universe, you’re playing in the sandbox, not engaging in science.
Not even Einstein immediately knew the power of the equations he gave us.
From before the Big Bang to Voyager 1, particle physicist Harry Cliff takes us on a whiz-bang tour of the Universe’s evolution.
The emergence of life in the universe is as certain as the emergence of matter, gravity, and the stars. Life is the universe developing a memory, and our chemical detection system could find it.
There are 40 billion billion black holes in the universe. Here’s how our Solar System stacks up against ten of them.
The passage of time is something we all experience, as it takes us from one moment to the next. But could it all just be an illusion?
On the largest of cosmic scales, the Universe is expanding. But it isn’t all-or-nothing everywhere, as “collapse” is also part of the story.
The Universe’s history, from cosmic inflation to the Big Bang to the present, is known. But whether it’s infinite or not is still a mystery.
The existence of another watery world in the outer solar system may offer clues to how such seas form — and hope for another spot to search for life.
The big-picture physics is simple – let gravity do its job.
Quantum mechanics has taught us that even empty space contains energy. “Negative energy” is the state of having less energy than empty space.
Was it the enormous magnitude of the quake, or is the problem with the buildings?
Some of them have survived the wilds of space for billions of years.
In Einstein’s relativity and the Standard Model, we only have three spatial dimensions. But there could be more, and many think there are.
The detection of two celestial interlopers careening through our solar system has scientists eagerly anticipating more.
The Universe is an amazing place. Under the incredible, infrared gaze of JWST, it’s coming into focus better than ever before.
To Fred Hoyle, the Big Bang was nothing more than a creationist myth. 75 years later, it’s cemented as the beginning of our Universe.
The idea of “absolute time” was our default for millennia. But time is relative, as gravity and motion both cause time to dilate.
Comet A3, also known as Comet Tsuchinshan-ATLAS, has sprung to life since 2024’s last equinox. Here’s how to catch the show for yourself.
It was barely a century ago that we thought the Milky Way encompassed the entirety of the Universe. Now? We’re not even a special galaxy.
Time gets a little strange as you approach the speed of light.
The record-breaking transmission could revolutionize deep space communication.