Paper Airplanes

Sam Harrelson on August 14, 2023

I love incorporating paper airplanes into my classroom lessons on dynamics, flight, movement, gravity… the list goes on and on. They’re so applicable to so many scientific principles but also appeal to the curious nature inside all of us that loves to fold and learn…

History of the Paper Airplane: Paper Flight Technology Inspires Drones:

“The magic of a paper airplane is that all of these little flight corrections are happening continuously throughout its flight,” Ristroph says. “The plane is hanging under a vortex that is constantly swelling and shrinking in just the right ways to keep a smooth and level glide.”

Reconnecting with Voyager 2

Sam Harrelson on August 7, 2023

Voyager 1 and 2 were launched in 1977 and have, by all expectations, exceeded their missions and then some. I was born in 1978, so I share some sentimental affinity with these two marvels of human engineering. Glad to see we reconnected with Voyager 2 after a few scary days there as it continues its incredible journey outside our solar system.

We’ll be in touch with the two Voyagers until they run out of their power reserves sometime in the 2030s. That will be a sad day. May we all contribute a verse to humanity’s story and the cosmos, much as these robots have done during their time!

I don’t think it’s a coincidence that my daughter was born on August 1, either 😉

NASA reestablishes full communications with Voyager 2:

Voyager 2 resumed communications with Earth after remaining silent for two weeks. At 12:29 a.m. EDT on Aug. 4, the spacecraft began returning science and telemetry data, indicating it is operating normally and remains on its expected trajectory, stated NASA.

Significant Benefits of social and Emotional Learning for Students in Yale Research

Sam Harrelson on August 2, 2023

If you ask almost any of us teachers what sort of skills or attitudes we’d love to see more developed in our students, you’d hear responses such as “resiliency” and “less anxiety.” In this first large-scale study of social and emotional learning approaches in k-12 education, Yale School of Medicine lays out some great findings (emphasis mine):

Research Finds Social and Emotional Learning Produces Significant Benefits for Students < Yale School of Medicine:

Students also showed improved social and emotional skills, attitudes, and behaviors, such as student self-efficacy, self-esteem, mindset, perseverance, and optimism, among others. Furthermore, the report confirmed that students who participate in SEL programs also feel better in school, reporting less anxiety, stress, depression, and suicidal thoughts. Students were also more connected and included and had better relationships with peers and teachers.

Happy Aphelion, Earthlings!

Sam Harrelson on July 7, 2023

I always love working with my students to help them realize the really interesting nature of the Earth’s tilt (and wobble) and how it directly impacts our seasons rather than proximity to the Sun!

When Is Aphelion 2023 and What It Means – The New York Times:

But don’t expect any relief from summer. Seasons on Earth are the product of changes in the amount of direct sunlight as the planet tilts toward and away from the sun — not its orbital path. It would take a much greater swing, so that the amount of received sunlight dropped significantly, in order to notice the difference.

“It’s Like a Choir”

Sam Harrelson on June 30, 2023

This has no bearing on your life and won’t change how you think about your drive to work.

“It’s like a choir, with all these supermassive black hole pairs chiming in at different frequencies,” Chiara Mingarelli, a NANOGrav scientist who worked on the new findings, said in a press release.

However, this is a HUGE deal. And those of us who follow these things are FREAKING OUT. Science is amazing. Life is amazing. This Creation that we get to participate in briefly is AMAZING!

Scientists Find the Gravitational Wave Background: What It Means:

Well, here it is. And it really is the big one!

Scientists from the North American Nanohertz Observatory for Gravitational Waves (NANOGrav) have officially made the first detections of the gravitational wave background.

They made the first detections of what? Fair question, especially if you haven’t, in fact, been extremely tuned in to physics and astronomy Twitter. So let’s back up…

“What’s next is everything,” she said in a press release. “This is just the beginning.”

Turns Out it’s not a Falcon Stage

Sam Harrelson on February 13, 2022

Corrected identification of object about to hit the moon:

Short version : back in 2015, I (mis)identified this object as 2015-007B, the second stage of the DSCOVR spacecraft. We now have good evidence that it is actually 2014-065B, the booster for the Chang’e 5-T1 lunar mission. (It will, however, still hit the moon within a few kilometers of the predicted spot on 2022 March 4 at 12:25 UTC, within a few seconds of the predicted time.)

Do fish feel pain?

Sam Harrelson on April 12, 2021

Puts a different spin on that fishing trip after I’ve always told myself “it’s ok, fish don’t feel pain” (to paraphrase Kurt Cobain)…

I was the first to identify the existence of nociceptors in a fish, the rainbow trout, in 2002. These are specialised receptors for detecting injury-causing stimuli, and their physiology is strikingly similar to those found in mammals, including humans. Since then, my laboratory and others across the world have shown that the physiology, neurobiology, molecular biology and brain activity that many fish species show in response to painful stimuli is comparable to mammals.

Source: There is ample evidence that fish feel pain | Fish | The Guardian

Muons’ Magnetic Moment

Sam Harrelson on April 7, 2021

Evidence is mounting that a tiny subatomic particle called a muon is disobeying the laws of physics as we thought we knew them, scientists announced on Wednesday.

The best explanation, physicists say, is that the muon is being influenced by forms of matter and energy that are not yet known to science, but which may nevertheless affect the nature and evolution of the universe. The new work, they said, could eventually lead to a breakthrough in our understanding of the universe more dramatic than the heralded discovery in 2012 of the Higgs boson, a particle that imbues other particles with mass.

Source: Finding From Particle Research Could Break Known Laws of Physics – The New York Times