The jellyfish that move through the seas by gently pulsing their saclike bodies may not seem to hold many secrets that would interest human engineers. But simple as the creatures are, jellyfish are masterful at harnessing and controlling the flow of the water around them, sometimes with surprising efficiency. As such, they embody sophisticated solutions… Continue reading What Can Jellyfish Teach Us About Fluid Dynamics?
Tag: Quantum Stuff
An Enormous Gravity ‘Hum’ Moves Through the Universe
Most likely, the gravitational waves come from pairs of supermassive black holes that are spiraling around each other inside merging galaxies. But we might be seeing something else entirely, perhaps something exotic such as ruptures in space-time itself resulting from loops of energy called cosmic strings. “Finding for the first time the suggestion of background… Continue reading An Enormous Gravity ‘Hum’ Moves Through the Universe
Which Creature Was the First to Take a Nap?
“No live organism can continue for long to exist sanely under conditions of absolute reality,” wrote Shirley Jackson in the first line of her 1959 horror novel The Haunting of Hill House. “Even larks and katydids are supposed, by some, to dream.” Jackson penned this line to introduce her haunted house, where the line between… Continue reading Which Creature Was the First to Take a Nap?
A New Map of the Universe, Painted With Cosmic Neutrinos
Probing Fundamental Physics Neutrinos offer rare clues that a more complete theory of particles must supersede the 50-year-old set of equations known as the Standard Model. This model describes elementary particles and forces with near-perfect precision, but it errs when it comes to neutrinos: It predicts that the neutral particles are massless, but they aren’t… Continue reading A New Map of the Universe, Painted With Cosmic Neutrinos
Neural Networks Need Data to Learn. Even If It’s Fake.
On a sunny day in late 1987, a Chevy van drove down a curvy wooded path on the campus of Carnegie Mellon University in Pittsburgh. The hulking vehicle, named Navlab, wasn’t notable for its beauty or speed, but for its brain: It was an experimental version of an autonomous vehicle, guided by four powerful computers… Continue reading Neural Networks Need Data to Learn. Even If It’s Fake.
Extreme Heat Is Deadlier Than Hurricanes, Floods and Tornadoes Combined
On June 25, 2022, Esteban Chavez, Jr., started his day like any other, working his route in Pasadena, Calif., as a driver for UPS. But the city was in the middle of an intense heat wave, and by midafternoon the temperature was higher than 90 degrees Fahrenheit. After completing his last delivery of the day,… Continue reading Extreme Heat Is Deadlier Than Hurricanes, Floods and Tornadoes Combined
Wildfires Will Only Get Worse. We Need Satellite Tracking of Air Pollution
People on the East Coast earlier this month experienced something that occurs with relative frequency in the West: ominous orange skies lit up by dense wildfire smoke. Across the I-95 corridor they responded with many important questions: How bad is the air quality where I live? Can I exercise outside? When will the smoke go… Continue reading Wildfires Will Only Get Worse. We Need Satellite Tracking of Air Pollution
How the Brain Protects Itself From Blood-Borne Threats
Enough pints of beer can have you falling off your bar stool or loudly reciting lyrics to early 2000s jams to total strangers, because alcohol can get past one of the strongest defenses in the body. If you’ve ever been drunk, high or drowsy from allergy medication, you’ve experienced what happens when some molecules defeat… Continue reading How the Brain Protects Itself From Blood-Borne Threats
The Simple Geometry That Predicts Molecular Mosaics
Over the next year, Domokos and his colleagues used geometric thinking to unpack the rules of molecular self-assembly — devising a new way to constrain the mosaics that molecules can form, using only the simple geometry of tessellation. “At first, they did not believe that you can do it,” Domokos said. “They were doing artificial… Continue reading The Simple Geometry That Predicts Molecular Mosaics
Do Insects Feel Joy and Pain?
In the early 1990s, when I was a Ph.D. student at the Free University of Berlin modeling the evolution of bee color perception, I asked a botany professor for some advice about flower pigments. I wanted to know the degrees of freedom that flowers have in producing colors to signal to bees. He replied, rather… Continue reading Do Insects Feel Joy and Pain?