The idea of infinity is probably about as old as numbers themselves, going back to whenever people first realized that they could keep counting forever. But even though we have a sign for infinity and can refer to the concept in casual conversation, infinity remains profoundly mysterious, even to mathematicians. In this episode, Steven Strogatz… Continue reading How Can Some Infinities Be Bigger Than Others?
Japan’s New Security Policies: A Long Road to Full Implementation
On December 16, 2022, Japan’s government released a new national security strategy, national defense strategy, and defense buildup program. In mid-January, Japanese Prime Minister Fumio Kishida and key Cabinet officials visited Washington to jointly highlight these documents and discuss the next steps for the U.S.-Japan alliance with the Biden administration. At the time, much commentary… Continue reading Japan’s New Security Policies: A Long Road to Full Implementation
Proteins Never Seen in Nature Are Designed Using AI to Address Biomedical and Industrial Problems Unsolved by Evolution
Machine learning (ML) and other AI- based computational tools have proven their prowess at predicting real-world protein structures. AlphaFold 2, an algorithm developed by scientists at DeepMind that can confidently predict protein structure purely on the basis of an amino acid sequence, has become almost a household name since its launch in July 2021. Today,… Continue reading Proteins Never Seen in Nature Are Designed Using AI to Address Biomedical and Industrial Problems Unsolved by Evolution
Can Grade Retention Help with COVID-19 Learning Recovery in Schools?
Requiring low-performing students to repeat a grade has been a long-standing and highly debated intervention in the United States. Calls to end social promotion in schools in the 1990s, along with the increasing popularity of educational accountability and standardized testing, led to test-based retention policies in many states and school districts. As of 2020, for… Continue reading Can Grade Retention Help with COVID-19 Learning Recovery in Schools?
How Magnetic Fields Control Galactic Growth
The Milky Way’s rotating disk of gas and dust gives rise to graceful spiral arms, which make up the galaxy’s most active star formation sites. Now researchers using an airplane-borne telescope high in Earth’s atmosphere have found a mechanism for how magnetic fields shape star birth in the dense filaments, or “bones,” that wind their… Continue reading How Magnetic Fields Control Galactic Growth
Why U.S. Military Interventions Fail and What to Do About It
American soldiers have been deployed abroad almost continuously since the end of World War II. The best-known foreign interventions—in Vietnam, Afghanistan, and Iraq—were large, long, and costly. But there have been dozens of other such deployments, many smaller or shorter, for purposes ranging from deterrence to training. Taken as a whole, these operations have had… Continue reading Why U.S. Military Interventions Fail and What to Do About It
Remaining in the Fold – SpiritualDirection.com
The sheep hear his voice, as he calls his own sheep by name and leads them out. When he has driven out all his own, he walks ahead of them, and the sheep follow him, because they recognize his voice. (John 10:3-4) This past weekend Christ taught us about Himself as our Good Shepherd. Just… Continue reading Remaining in the Fold – SpiritualDirection.com
Why the Brain’s Connections to the Body Are Crisscrossed
Dazzling intricacies of brain structure are revealed every day, but one of the most obvious aspects of brain wiring eludes neuroscientists. The nervous system is cross-wired, so that the left side of the brain controls the right half of the body and vice versa. Every doctor relies upon this fact in performing neurological exams, but… Continue reading Why the Brain’s Connections to the Body Are Crisscrossed
America’s Dangerous Short War Fixation
Americans have long been fixated on the idea of the short, decisive war. At the start of the American Civil War, Washington gentry traveled to watch the First Battle of Bull Run—to partake of a spectacle they presumed would soon end. In 1898, U.S. Secretary of State John Hay expected the Spanish-American War to be… Continue reading America’s Dangerous Short War Fixation
How Physicists Cracked a Black Hole Paradox
A few years ago a team of chemists unboiled an egg. Boiling causes protein molecules in the egg to twist around one another, and a centrifuge can disentangle them to restore the original. The technique is of dubious utility in a kitchen, but it neatly demonstrates the reversibility of physics. Anything in the physical world… Continue reading How Physicists Cracked a Black Hole Paradox