Scientists hope to answer three specific questions: Do the observed black holes really have event horizons? Are they as featureless as the no-hair theorem says? And do they distort spacetime exactly as the Kerr metric predicts?
How do you prove that you’re observing a bizarre, featureless hole in the fabric of space and time?
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Executive director & co-founder of kiss the ground, and producer of kiss the ground the movie, discussing regenerative agriculture for planetary regeneration.
Ryland Engelhart, is Executive Director & Co-Founder of Kiss The Ground (https://kisstheground.com/), a non-profit organization dedicated to planetary regeneration, and is the producer of Kiss The Ground, the Movie, recently released on Netflix.
Mr. Engelhart has spent the last 15 years as an entrepreneur working in hospitality and building a family business of organic, plant-based restaurants called Cafe Gratitude and Gracias Madre, located in Southern California.
Researchers have been studying chloride’s corrosive effects on various materials for decades. Now thanks to high-performance computers at the San Diego Supercomputer Center (SDSC) at UC San Diego and the Texas Advanced Computing Center (TACC), detailed models have been simulated to provide new insight on how chloride leads to corrosion on structrual metals, resulting in economic and environmental impacts.
Conducted by a team from Oregon State University’s (OSU) College of Engineering, a study discussing this newfound information was published in Materials Degradation, a Nature partner journal.
“Steels are the most widely used structural metals in the world and their corrosion has severe economic, environmental, and social implications,” said study co-author Burkan Isgor, an OSU civil and construction engineering professor. “Understanding the process of how protective passive films break down helps us custom design effective alloys and corrosion inhibitors that can increase the service life of structures that are exposed to chloride attacks.”
Summary: Using data from RNA sequencing, researchers have identified three molecular subtypes of Alzheimer’s disease.
Source: Mount Sinai Hospital.
Researchers at the Icahn School of Medicine at Mount Sinai have identified three major molecular subtypes of Alzheimer’s disease (AD) using data from RNA sequencing. The study advances our understanding of the mechanisms of AD and could pave the way for developing novel, personalized therapeutics.
Can I sign up to go to the moon? It might be easier than trying to get a better 4G here on planet Earth.
In-space transportation provider Momentus is delaying its first operational mission because of delays completing an interagency review.
WASHINGTON — In-space transportation provider Momentus is delaying its first operational mission, which was to fly on a SpaceX Falcon 9 later this month, because of delays completing an interagency review.
In a Jan. 4 statement, Momentus said the flight of its first Vigoride tug, which was to be part of the payloads on a Falcon 9 dedicated rideshare mission launching as soon as Jan. 14, will be delayed to later in the year because it was unable to get approval from the Federal Aviation Administration for the mission.
“This move will allow for the additional time necessary to secure FAA approval of Momentus’ payloads, including completion of a standard interagency review,” the company said in a statement.
For mathematicians and computer scientists, 2020 was full of discipline-spanning discoveries and celebrations of creativity. We’d like to take a moment to recognize some of these achievements.
1. A landmark proof simply titled MIP = RE” establishes that quantum computers calculating with entangled qubits can theoretically verify the answers to an enormous set of problems. Along the way, the five computer scientists who authored the proof also answered two other major questions: Tsirelson’s problem in physics, about models of particle entanglement, and a problem in pure mathematics called the Connes embedding conjecture.
2. In February, graduate student Lisa Piccirillo dusted off some long-known but little-utilized mathematical tools to answer a decades-old question about knots. A particular knot named after the legendary mathematician John Conway had long evaded mathematical classification in terms of a higher-dimensional property known as sliceness. But by developing a version of the knot that yielded to traditional knot analysis, Piccirillo finally determined that the Conway knot is not slice.
3. For decades, mathematicians have used computer programs known as proof assistants to help them write proofs — but the humans have always guided the process, choosing the proof’s overall strategy and approach. That may soon change. Many mathematicians are excited about a proof assistant called Lean, an efficient and addictive proof assistant that could one day help tackle major problems. First, though, mathematicians must digitize thousands of years of mathematical knowledge, much of it unwritten, into a form Lean can process. Researchers have already encoded some of the most complicated mathematical ideas, proving in theory that the software can handle the hard stuff. Now it’s just a question of filling in the rest.
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Flying cars are fine — but why use a car when you can have a motorcycle instead? YC-backed startup JetPack Aviation wants to answer that question with the world’s first flying motorcycle, a personal aircraft dubbed “The Speeder,” a name that Star Wars fans will surely appreciate. Now, JetPack has raised a seed round of $2 million from investors indulging Draper Associates, Skype co-founder Jaan Tallinn, YC, Cathexis Ventures and a group of angels that it says will fund the development of the Speeder’s first functional prototype.
Back in March, JetPack revealed its plans for the Speeder, which it says will provide a fully stabilized ride that’s either pilot-controlled or fully autonomous. It can take off and land vertically, and reach top speeds of potentially over 400 MPH. There are no exposed rotors systems, which make it a lot safer and easier to operate than a lot of other VTOL designs and helicopters, and the company says it can also be refueled in less than 5 minutes, which is a dramatically shorter turnaround time for powering up versus an electric vehicle.
Scientists around the world have noted that the Earth has been spinning on its axis faster lately—the fastest ever recorded. Several scientists have spoken to the press about the unusual phenomenon, with some pointing out that this past year saw some of the shortest days ever recorded.
For most of the history of mankind, time has been marked by the 24-hour day/night cycle (with some alterations made for convenience as the seasons change). The cycle is governed by the speed at which the planet spins on its axis. Because of that, the length of a day has become the standard by which time is marked—each day lasts approximately 86400 seconds. The day/night cycle is remarkably consistent despite the fact that it actually varies slightly on a regular basis.
Several decades ago, the development of atomic clocks began allowing scientists to record the passage of time in incredibly small increments, in turn, allowing for measuring the length of a given day down to the millisecond. And that has led to the discovery that the spin of the planet is actually far more variable than once thought. Since such measurements began, scientists have also found that the Earth was slowing its spin very gradually (compensated by the insertion of a leap second now and then)—until this past year, when it began spinning faster—so much so that some in the field have begun to wonder if a negative leap negative second might be needed this year, an unprecedented suggestion. Scientists also noted that this past summer, on July 19, the shortest day ever was recorded—it was 1.4602 milliseconds shorter than the standard.
