They did it by observing several frequencies of radio signals emitted by these supermassive black holes. Over time, they have essentially been able to plot their trajectory and confirm them as a visual binary system. In other words, they claim they've observed these black holes in orbit with one another, though it's really inference.
Glyphosate, a component of the popular herbicide commonly known as Roundup in the United States, has been placed on California's Proposition 65 list, which requires a cancer warning label on it, despite the fact no regulatory body can find evidence it harms anyone or anything other than what it is supposed to harm, much less that it causes any cancer.-->
The clip below, together with the following few which will be published every few days in the coming weeks, is extracted from the third chapter of my book "Anomaly! Collider Physics and the Quest for New Phenomena at Fermilab". It recounts the pioneering measurement of the Z mass by the CDF detector, and the competition with SLAC during the summer of 1989.-->
Ravens and great apes have not shared a common ancestor for over 300 million years, so what explains it? Evolution is not a straight line and the authors speculate that the cognitive "planning" abilities they share in common re-appeared, on a separate evolutionary path, in the birds.
Ever since the Brookhaven laboratories estimated the quantity at a value over 3 standard deviations away from the equally precise theoretical predictions, the topic (could the discrepancy be due to new physics??) has been commonplace in dinner table conversations among HEP physicists.
That species is the eight-legged micro-animal tardigrade, the world's most indestructible species.
Then I looked at the author: Paul Thacker.
An examination of three aspects of cognition across two menstrual cycles found that the levels of estrogen, progesterone and testosterone had no impact on working memory, cognitive bias or ability to pay attention to two things at once.
While some hormones were associated with changes across one cycle in some of the women taking part, these effects didn't repeat in the following cycle. Overall, none of the hormones the team studied had any replicable, consistent effect on study participants' cognition.
It is always nice to learn that a new hadron is discovered - this broadens our understanding of the extremely complicated fabric of Quantum Chromodynamics (QCD), the theory of strong interactions that govern nuclear matter and are responsible for its stability. -->
Physical science is not immune. String Theory put theory in the name, so it gets to skate on the edges of truth, but theoretical physicists are trying to recapture the Golden Age of the 1930s, plus write a bestselling book. Astrophysics should know better. Yet many have still used the word theory to describe the "glitch" and "wobble" detected among pulsars, despite having no basis for it.
Hawking Says Trump Could Tip Earth To Hot Venus Climate - Is It True? What Can Earth's Climate Tip To?
Stephen Hawking celebrated his seventy fifth birthday on the 2nd July. We can all be delighted that he lived so long, and continues in robust health, after he was diagnosed to survive only three years. May he continue to "live long and prosper" as the fictional Vulcans say in Star Trek (a UK man can expect to live another 12 years if he reaches his 75th birthday, other things being equal). He's a brilliant physicist, everyone agrees, noted for his work in General Relativity and related areas. However he has never done any research in climate change AFAIK.-->
Only the weakest candidate wants to be hired as part of a quota. There has to be a better way.
Meanwhile, media attention given to performance enhancing drugs may encourage amateurs to try them. But it is unlikely to help, according to a new paper published in The Lancet Haematology journal.
A day or two ago I came across this article-->
A common definition of the word dust refers to fine, dry particles of matter. From dust storms on earth to cosmic dust, just about everywhere that any form of matter is present, dust will also be present. That includes the ubiquitous household dust that seems to magically appear in our homes on every surface and in the form of dust bunnies under furniture.-->
Like preventing plant sunburn.
Hydrogen peroxide is a by-product of photosynthesis in parts of plant cells called chloroplasts, much like it is in our bodies by cellular respiration. Using a fluorescent protein that detects hydrogen peroxide, the researchers behind a new study in Nature Communications observed how H2O2 moves from chloroplasts and can be detected in cell nuclei. -->