In a laboratory in Scotland, a revolutionary kind of laser is taking shape – the first one to be made out of an artificial black hole. Once complete, the device could help confirm mounting evidence that real black holes, despite their name, emit light. A black-hole laser could also find practical uses in devices that…
One of the unsolved mysteries of contemporary science is how highly organized structures can emerge from the random motion of particles. This applies to many situations ranging from astrophysical objects that extend over millions of light years to the birth of life on Earth. The surprising discovery of self-organized electromagnetic fields in counter-streaming ionized gases…
Around the cosmos, black holes aren’t known for being the nicest neighbors. They tend to make their presence felt in unpleasant ways, pulling nearby matter inward even as they belch out violent blasts of plasma and radiation. Put two of them in the same neighborhood and the resulting tug-of-war can quickly turn ugly. But in…
A pair of mathematicians have proposed a unified theory of dark matter and dark energy that alters Einstein’s equations describing the fundamentals of gravity. The researchers suggest the law of energy and momentum conservation in spacetime is valid only when normal matter, dark matter and dark energy are all taken into account. For normal matter…
Billions of times the mass of our own sun, so-called massive black holes present a baffling mystery with clues hidden at the very dawn of existence.
Successful as it is, there are notable unsolved questions with the standard big bang theory, which suggests that the universe began as a seemingly impossible “singularity,” an infinitely small point containing an infinitely high concentration of matter, expanding in size to what we observe today. The theory of inflation, a super-fast expansion of space proposed…
The grand scheme, a stepping-stone to string theory, is still high on physicists’ wish lists. But if no solid evidence surfaces soon, it could begin to have a serious PR problem
More scientists are getting closer in the search for the “God particle” of physics that would help explain the fundamentals of the universe, but they haven’t found it yet. In the hunt for the Higgs boson, which is key to understanding why matter has mass, two teams of physicists using results from a now-closed American…
What existed before the big bang? What is the nature of time? Is our universe one of many? On the big questions science cannot (yet?) answer, a new crop of philosophers are trying to provide answers. Stephen Hawking may have famously declared that “Philosophy is dead.” but philosopher of physics Tim Maudlin disagrees. Maudlin, whose…
At the end of the Cretaceous period some 65 million years ago, an asteroid slammed into Mexico’s Yucatan Peninsula, causing severe but selective extinction. While that is widely accepted, it has remained unclear exactly what the mechanisms were that caused extinction of ocean-dwelling organisms. Proposed explanations include global darkness due to blocking of sunlight with…