Teasing sounds apart in an underwater habitat is like trying to listen for the crackle of a single street light in the middle of Times Square. So when scientists thought they heard the sound of algae on a coral reef, their hunch was met with some skepticism. How could something seemingly so sedentary ring out over some of the ocean’s chattiest (and most flatulent) inhabitants, sloshing waves, and noisy humans? With bubbles, it turns out.
(Hakai)
Like the plants that help us breathe, algae also photosynthesize. Underwater, that process of converting sunlight and carbon dioxide into energy and oxygen sends tiny bubbles spiraling toward the surface. And according to new research, when each bubble detaches from the seaweed, it goes ping. The scientists behind the discovery suggest that, like a heartbeat heard through a stethoscope, measuring that unique sound could be a new way to monitor the health of a coral reef.
Photosynthesis Makes a Sound
12.03.18
How to Survive the Next Era of Tech (Slow Down and Be Mindful)
In his final State of the Art column, Farhad Manjoo reflects on the industry’s changes and presents a new guide for navigating the future of technology.
(New York Times)
Fantasyland: How America Went Haywire
A Winter Walk
Though winter is represented in the almanac as an old man, facing the wind and sleet, and drawing his cloak about him, we rather think of him as a merry woodchopper, and warm-blooded youth, as blithe as summer. The unexplored grandeur of the storm keeps up the spirits of the traveler. It does not trifle with us, but has a sweet earnestness. In winter we lead a more inward life. Our hearts are warm and cheery, like cottages under drifts, whose windows and doors are half concealed, but from whose chimneys the smoke cheerfully ascends. The imprisoning drifts increase the sense of comfort which the house affords, and in the coldest days we are content to sit over the hearth and see the sky through the chimney-top, enjoying the quiet and serene life that may be had in a warm corner by the chimney-side, or feeling our pulse by listening to the low of cattle in the street, or the sound of the flail in distant barns all the long afternoon. No doubt a skillful physician could determine our health by observing how these simple and natural sounds affected us. We enjoy now, not an Oriental, but a Boreal leisure, around warm stoves and fireplaces, and watch the shadow of motes in the sunbeams. — Thoreau
From Civil Disobedience
“Take long walks in stormy weather or through deep snows in the fields and woods, if you would keep your spirits up. Deal with brute nature. Be cold and hungry and weary.”
Thoreau, On the Duty of Civil Disobedience
City Parks May Mend the Mind
(Scientific America)
Exposure to natural settings has been linked with a vast array of human health benefits, from reduced rates of depression to increased immune functioning. Two recent studies found evidence suggesting that urban green spaces, such as parks and gardens, may also improve cognitive development and buffer against the effects of health inequality.
The Secret Language of Trees
(To The Best Of Our Knowledge)
Thanksgiving
“I am grateful for what I am and have. My thanksgiving is perpetual. It is surprising how contented one can be with nothing definite – only a sense of existence. Well, anything for variety. I am ready to try this for the next ten thousand years, and exhaust it. How sweet to think of! my extremities well charred, and my intellectual part too, so that there is no danger of worm or rot for a long while. My breath is sweet to me. O how I laugh when I think of my vague indefinite riches. No run on my bank can drain it, for my wealth is not possession but enjoyment.”
–Henry David Thoreau in a letter to Harrison Blake (December 6, 1853)
Dean’s List 