The Invisibility Thread

[RadishRose]

 

[RadishRose]

 

[officerripley]

Also being a not-young woman "works".

 

[OldFeller]

I decided not to post here when it became clear that I couldn't really see myself in an invisibility thread.

 

[GoneFishin]

Invisible moth

 

[Meanderer]

rent this invisible house to disappear into california's mojave desert

 

[Meanderer]

I decided not to post here when it became clear that I couldn't really see myself in an invisibility thread.

Who remembers this Old Feller.......?

 

[Meanderer]

 

[Meanderer]

rent this invisible house to disappear into california's mojave desert

Another view!

 

[Meanderer]

 

[Meanderer]

AI Overview

"Invisibility" on Mars refers to phenomena unseen by the naked eye but detected by instruments, including "dirty frost" camouflaged in visible light, UV aurora-type nightglow, and thousands of dust-free convective vortices.

NASA’s MAVEN mission also identified "invisible" atmospheric sputtering stripping the planet, while infrared cameras have uncovered hidden subsurface water ice.


Key invisible or hidden features on Mars include:

"Dirty Frost" & Avalanches: Infrared cameras revealed water ice or "dirty frost" that blends in with the surface, which may trigger dark dust avalanches as it vaporizes.

Invisible Dust Devils: NASA's InSight lander detected thousands of convective vortices, but many did not pick up dust, making them invisible to regular cameras.

UV Auroras: Mars has no global magnetic field, but local magnetic crustal pockets create "invisible" ultraviolet auroras caused by solar wind interaction, mapped by MAVEN.

Atmospheric Sputtering: NASA’s MAVEN mission directly observed an "invisible force"—atmospheric sputtering—that is stripping away the Martian atmosphere and has contributed to its loss of water.
Subsurface Water Ice: Infrared (IR) cameras are used to map surface composition and detect vital in-situ resources like water ice that are otherwise buried beneath the surface.

Invisible Light Imagery: Projects like "Invisible Mars" use data from spectrometers and other instruments to show the planet in wavelengths beyond human vision, revealing geological features.

Note: There are also, rarely, situations where the entire planet becomes effectively invisible to cameras during extreme dust storms that cover the whole planet, causing it to look like a featureless ball.

 

[Meanderer]

The 99 Percent Invisible City: A Field Guide to the Hidden World of Everyday Design​

by Roman Mars, Kurt Kohlstedt

“Here is a field guide, a boon, a bible, for the urban curious. Your city’s secret anatomy laid bare—a hundred things you look at but don’t see, see but don’t know. Each entry is a compact, surprising story, a thought piece, an invitation to marvel. Together, they are almost transformative. To know why things are as they are adds a satisfying richness to daily existence. This book is terrific, just terrific.”
—Mary Roach, New York Times bestselling author of Stiff, Grunt, and Gulp

“The 99% Invisible City brings into view the fascinating but often unnoticed worlds we walk and drive through every day, and to read it is to feel newly alive and aware of your place in the world. This book made me laugh, and it made me cry, and it reminded me to always read the plaque."
—John Green, New York Times bestselling author of The Fault in Our Stars and Turtles All The Way Down

 

[Meanderer]

Key Invisible Exercise Examples:

Glute Squeezes: Tighten your glutes while sitting or standing in line, holding for 10–20 seconds.

Stomach Vacuums: Tighten your abdominal muscles, pulling your navel toward your spine, and hold while breathing normally.

Calf Raises: Raise your heels off the ground while standing at a counter or desk to strengthen lower legs.

Isometric Core Brace: Tighten your entire core, as if preparing for a punch, while walking or sitting.

Desk/Chair Push-offs: Place hands on armrests and lift your weight off the seat, holding for several seconds to engage arms and core.

Shoulder Blade Squeezes: Pinch shoulder blades together to reverse slouching.
Leg Extensions: While seated, extend one or both legs straight out under your desk and hold.

Discreet Daily Activities (NEAT)

Walking meetings or walking to work.

Cleaning, gardening, or washing a car.

Grocery Bicep Curls: Using grocery bags as light weights while unloading.

Using Stairs: Choosing stairs over elevators.

Facial and Neck "Invisible" Moves

Ear Lift: Relax the face and jaw, then smile while concentrating on lifting the ears.

Neck Resistance: Place a hand against the head and gently press, resisting with neck muscles.

Jaw Relaxation: Maintain "lips together, teeth apart" to avoid overworking jaw muscles.

"These movements are particularly effective for improving posture, balance, and maintaining strength throughout the day, even during desk work."