Time always moves in the same direction, but what if the Universe were contracting? As we step forward in time, a number of things always seem to happen together. Objects […]
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You searched for: Physical Constants
If you can’t surpass it in a vacuum, try doing so in a medium instead. In our Universe, there are a few rules that everything must obey. Energy, momentum, and angular […]
Or is ‘new space’ created in between the gaps of the ‘old’ space? It’s been almost 100 years since humanity first reached a revolutionary conclusion about our Universe: space itself doesn’t […]
‘Reductio ad absurdum’ won’t help you in an absurd Universe. Throughout history, there have been two main ways humanity has attempted to gain knowledge about the world: top-down, where we […]
The paper-thin device may also someday be used to stimulate bone growth.
Even before the Big Bang, energetic radiation was always present. When it comes to the physical Universe, the notion of “nothing” may truly be possible only in theory, not in […]
An exclusive interview with physicist Lee Smolin reveals how abandoning Einstein’s dream may have been a terrible mistake.
The expansion rate is dropping, but distant galaxies are accelerating. Here’s how. If you take a look at any galaxy in the Universe that isn’t gravitationally bound to our own, we’ve […]
The concept of ‘relativistic mass’ has been around almost as long as relativity has. But is it valid? No matter who you are, where you are, or how quickly you’re moving, […]
The Big Theoretical Physics Problem At The Center Of The ‘Muon g-2’ Puzzle In early April, 2021, the experimental physics community announced an enormous victory: they had measured the muon’s magnetic […]
Our ultimate fate depends on something we’ve barely begun to measure. One of the biggest mysteries in all of physics is dark energy. According to our best observations, the Universe cannot […]
If it wasn’t a singularity, how small could it have been? Today, when you look out in any direction as far as the laws of physics allow us to see, the […]
Even addition has to play by different rules for black holes. How do you add 28 and 47 together? This simple math question helps us highlight the many different ways that […]
Have we always had quantum fields in the Universe? Or did they emerge at some finite time? No matter how we look at the Universe — at low temperatures or ultra-high energies, from […]
As bad as this sounds, a new essay suggests that we live in a surprisingly egalitarian age.
“The Expanse” is the best vision I’ve ever seen of a space-faring future that may be just a few generations away.
The majority of Americans are stressed, sleep-deprived and overweight and suffer from largely preventable lifestyle diseases such as heart disease, cancer, stroke and diabetes. Being overweight or obese contributes to […]
This is your brain on work.
Once only dark energy remains, empty space still won’t be completely empty. Imagine, if you dare, the very end of the Universe. The stars — past, present, and future — have all burned out. […]
We frequently say it’s 2.725 K: from the light left over all the way from the Big Bang. But that’s not all that’s in the Universe.
It’s that the Universe can be understood at all. Don’t deafen yourself to its lessons. In a nutshell, 2020 has been a unique year in human history. For the first time […]
We have to use the right definition for the specific question we’re asking. When it comes to the Universe, we frequently characterize objects by examining and reporting on their physical […]
Enough mass in one location will always create a black hole. But not all masses are possible. If you take enough mass and compress it into a small enough volume […]
Counterintuitively, directly combating misinformation online can spread it further. A different approach is needed.
Something isn’t adding up, but it isn’t a calibration error. It’s been nearly 100 years since we discovered that the Universe was expanding. Ever since, the scientists who study the […]
Humans are particularly prone to shiver when a group does or thinks the same thing at the same time.
Of all the injustices in Nobel Prize history, her 1957 Nobel snub is the most egregious. One of the biggest scientific revolutions of the 20th century was the discovery of […]
Evolutionary success is not about the number of one’s children, but one’s grandchildren: the children need to survive and pass on their genes.
The anthropic principle has some fascinating scientific uses. And abuses, too. For thousands of years, humans have pondered the meaning of our existence. From philosophers who debated whether their minds could […]