Water Used as Invisible Ink

Is that paper really blank? A new technique using special reusable paper makes water an undetectable invisible ink. Researchers in China developed a rewriteable paper coating that can encrypt secret information with relatively low-tech invisible ink — water.

A message printed out by a water-jet printer on a manganese-complex-coated paper is invisible to the naked eye, but the message reveals itself under 254 nm UV light. The paper can be ready for another round of printing after erasing the message by heating it with a blow dryer for 15-30 seconds. The method, presented September 25 in the journal Matter, allows reversible secure printing for at least 30 cycles. The recorded information is invisible under both ambient light and typical UV light. The data will only appear under a photoluminescence lifetime imaging (PLIM) technique, protecting it from general decryption methods. (PhysOrg)

The water-jet printing method is cost efficient ($0.002/print) and environmentally safe, although the short-wavelength UV light used to read the page is still potentially harmful to humans.

What will be the first book published using invisible water printing?

#invisibleink#hiddenmessage#chinesecrypto#oddnews#strangenews#hiddenart#shortuv#cheapprinting#waterprinter#interestinginventions#inventions

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Flexible Sweat-Powered Biofuel Cells

True Strange News: Have you ever thought of human perspiration as a biofuel? A stretchable sweat-powered biofuel cell can now run an LED light.

Bioelectrochemists from France collaborated with a University of San Diego team in California who are experts in nanomachines, biosensors, and nano-bioelectronics. Together they developed a flexible conductive material consisting of carbon nanotubes, crosslinked polymers, and enzymes joined by stretchable connectors that are directly printed onto the material through screen-printing. Issue 43 of the Journal of Materials Chemistry shows that this work has been ongoing. “Wearable textile biofuel cells for powering electronics” was published in 2014 includes a supplement showing different types of textile materials on which the biofuel cells can be printed.

That published article stated:

“The textile biofuel cell utilizes physiologically produced sweat lactate as the fuel to generate electrical energy, producing up to 100 μW cm−2 at 0.34 V during in vitro experimentation, even after repeated bending stress.

The biofuel cell developed follows deformations in the skin and produces electrical energy by oxidation of the lactate present in perspiration. Once applied to the arm, it uses a voltage booster to continuously power an LED. It is relatively simple and inexpensive to produce. The primary cost is production of enzymes to transform compounds found in sweat. Amplifying the voltage provided by the biofuel cell to power larger portable devices is the next step. #biofuel#sweatpower#biofuelcell#strangenews#altenergy#sweatasbiofuel#interestinginventions

Largest Hula World Record and Why It Matters

True Strange News: Sept. 12 — Getti Kehayova, in Las Vegas (@getti_hulahoops on Instagram) now holds the Guinness World Record for largest hula hoop spun by a female. Getti said she had to practice for a year to accomplish this record breaking hula and she used a protective vest to keep from damaging her ribs.

The former circus performer achieved the record by spinning a hula hoop measuring 17 feet and 1/4 inches in diameter around her body three times. (UPI)

Miss Kehayova told True Strange News recently that although her custom made hoop was constructed of titanium, a light metal, it was still very heavy due to its size.

The current male record is held by an Indian father-son duo, Krishan Bhatia, 51 and Kshitij Bhatia, 16. They broke the Guinness World Record for the Largest Hula Hoop Spun; twirling a giant hula hoop measuring 5.31 meters (17 ft. 4 inches). This record was previously held by Yuya Yamada of Japan, who spun a hula hoop of size 16 ft 10 inches.

Here’s why this accomplishment matters to us: One of the great things we do as humans is explore our limits and push beyond boundaries. This is why this reporter enjoys record breaker stories. The fact that someone worked this hard and successfully spun such a massive hula hoop can give us all hope that we humans can make it, that we have a fighting chance to explore our way out of the upcoming challenges we may face.

Keep up the good work!

#largesthulahoop#gianthoop#biggesthulahoop#hulahopprecord#worldrecord#hulahoop#hula#strangenews#oddnews

Tonight: a Rare Harvest Micromoon on a Friday the 13th

True Strange News: Tonight, Friday September 13th, 2019, a rare harvest micromoon will rise. Not only is this a full moon on a Friday the 13th, but it is also a harvest moon, that is, a full moon that occurs closest to the autumnal equinox. It is also a micromoon, which will appear about 14% smaller than a supermoon because the moon is now at its apogee, the farthest point from earth. A full moon won’t fall on a Friday the 13th again until August 2049.

I hope you get a chance to see the rare harvest micro-moon tonight.

Xeno

Crows in San Francisco Bring Gifts for Food

True Strange News. September 3, 2019. Some crows in San Francisco are bringing gifts for a woman who feeds them.

“Melinda Green said she started feeding two families of crows that congregate outside her Marina District apartment about three years ago. Green told KGO-TV she and the crows have “rules established,” where they will watch for her blinds to be open and then come to collect treats from her fire escape landing and windowsill. … the crows started leaving her gifts in exchange for the food (including) portions of a champagne bottle, gummy bears, colorful rocks, bones, nuts and strange bits of antique electronics.

Examples of gifts from crows

“At this point I am sure they are gifts. They’re showing appreciation for the food,” she said. Researchers have documented crows bringing “gifts” to people who feed them in the past.” (UPI)

More examples of gifts from crows

Cats, Dogs, Dolphins, Crows and Ravens are among the few unique animals that have been regularly seen giving physical items as gifts to humans. Crow and raven gift photo credits: @the.realist.environmentalist @ibreakteacups @miatyrannosaurusrex

#gratefulcrows#thankfulcrows#giftingcrows#crowcurrency#crowsaresmart#oddnews#strangenews

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Nanoparticles Give Mice Night-Vision

True Strange News: August 27, 2019. Scientists have used nanoparticles to give a superpower to ordinary mice: the ability to see near-infrared light. This type of nanoparticles could someday give built-in night vision to humans. (SciDaily)

Like humans, mice can not see light wavelengths beyond about 700 nanometers (red) but the nanoparticles absorb longer wavelength infrared light and convert it to shorter wavelengths detected by retina cells. (@quizx.in) The rare-earth elements erbium and ytterbium can convert low-energy photons from NIR (750 nm to 1.4 micrometers) light into higher-energy green light that mammalian eyes can see.

No telling what the world would look like to these enhanced mice, but they might see a cat like the one here. This cool cat is @sansathecat in infrared.

#strangenews#superpowers#infraredvision#bionicmice#seemore#nanotechnology#nanotech#oddnews

Video of “Migrating” Mattresses

True Strange News August 17, 2019: A movie night under the stars in Stapleton, Colorado failed to account for high local winds, resulting in a surreal scene captured on video by Robb Manes who dubbed it the “Great Mattress Migration of 2019.”

Footage shows more than 150 inflatable air mattresses flying through the air. Seeing a few hop the fence into a swimming pool made me laugh. Video Credit: @robbmanes

#flyingmattress#mattressmigration#surreal#strangenews#oddnews

True Strange News strives to bring you interesting stories and events with a positive focus. Feed your mind with positive curiosity. Feed the light.

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Art: Strange Tire Elephants

Life is great. After decades of exploring cyberspace, we can still find new beautiful strange things like this almost every day.

From @artsloyal on Instagram.

Another angle from @modernartt

Who knows where this sculpture is located?

I haven’t found this one yet, but here’s another:

Nashville artist Alex Lockwood of Elephant Gallery created an absolutely incredible life-sized sculpture of an Asian elephant out of recycled tires. The Elephant Sanctuary in Hohenwald, Tennessee hosted a drive to collect used tires from the local community. This wonderful rubber pachyderm was revealed on World Elephant Day 2017 and sits in front of the Elephant Discovery Center at the Sanctuary.

(Via LaughingSquid)

As long as they don’t become breeding grounds for mosquitoes, I’d like to see hundreds of these popping up all over the place. So cool.

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Top Views for TrueStrange this Week

This small peaceful odd news blog has had little impact. This is good, from my perspective. I don’t want to be an “influencer,” I just want to say a few words about things I find of interest, like millions of others are doing. I just do it here rather than on Facebook because I learned to make web pages years ago and this way I don’t have to see any advertisements.

Below is a look at what people are interested in on TrueStrange.com this week: Mostly the all black chicken and the idea that C3PO has a silver leg but no one noticed. Also an artwork that looks like there was an ancient atom bomb (but it’s just art), and the claim of an “anti-gravity” flying platform powered by bug wings (uh, no.) and a few others.

Keep in mind that most of those views may be robots and crawlers that catalog the web constantly.

TrueStrangeTraffic

I’m small potatoes and I’d like to stay that way, thanks. I get email requests about getting this site on the front page of google searches, etc. but I don’t care about having a popular web site. I’m not selling anything, so I’m glad to have a site that is obscure and has only a few real viewers.

I hope you are well.

Peace,

Xeno

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