Scientists at UCL and the IIT -Istituto Italiano di Tecnologia (Italian Institute of Technology) have created a temporary tattoo with light-emitting technology used in TV and smartphone screens, paving the way for a new type of "smart tattoo" with a range of potential uses.
The technology, which uses organic light-emitting diodes (OLEDs), is applied in the same way as water transfer tattoos. That is, the OLEDs are fabricated on to temporary tattoo paper and transferred to a new surface by being pressed on to it and dabbed with water.

The researchers, who described the process in a new paper in the journal Advanced Electronic Materials, say it could be combined with other tattoo electronics to, for instance emit light when an athlete is dehydrated, or when we need to get out of the sun to avoid sunburn. OLEDs could be tattooed on packaging or fruit to signal when a product has passed its expiry date or will soon become inedible, or used for fashion in the form of glowing tattoos.

Professor Franco Cacialli (UCL Physics & Astronomy), senior author of the paper, said: "The tattooable OLEDs that we have demonstrated for the first time can be made at scale and very cheaply. They can be combined with other forms of tattoo electronics for a very wide range of possible uses. These could be for fashion - for instance, providing glowing tattoos and light-emitting fingernails. In sports, they could be combined with a sweat sensor to signal dehydration.

CBET 4937 & MPEC 2021-D113, issued on 2021, February 26, announce the discovery of an apparently asteroidal object (magnitude ~19) on CCD images taken on Feb. 12.6 UT with a 0.5-m f/2 Schmidt reflector at Haleakala, Hawaii, in the course of the "Asteroid Terrestrial-Impact Last Alert System" (ATLAS) search program. This object has been found to show cometary appearance by CCD astrometrists elsewhere after the object was posted on the Minor Planet Center's PCCP webpage due to its orbit. The new comet has been designated C/2021 C4 (ATLAS).

We performed follow-up measurements of this object while it was still on the PCCP webpage.

Stacking of 5 unfiltered exposures, 90 seconds each, obtained remotely on 2021, February 22.2 from X02 (Telescope Live, Chile) through a 0.6-m f/6.5 astrograph + CCD, shows that this object is a comet with a compact coma about 8" arcsecond in diameter. (Observers E. Guido, M. Rocchetto, E. Bryssinck, M. Fulle, G. Milani, C. Nassef, G. Savini, A. Valvasori).

Our confirmation image (click on it for a bigger version; made with TYCHO software by D. Parrott):

Everyone knows that robots aren't living beings right? Well, we did. That is, until scientists and developers recently announced how they have bridged some of that gap between living and non-living beings.

This new development is a combination of artificial intelligence and biology. In fact, only this week, a research of roboticists and scientists published what is being referred to as a "recipe for making a new lifeform" called xenobots. The xenobots are made from stem cells and the term xeno comes from the frog cells (xenopus laevis) which are used to make them.

One of the researchers involved described the new creation as "neither a traditional robot nor a known species of animal" but instead it is a "new class of artifact: a living, programmable organism."

File this under "What Could Possibly Go Wrong?"

A team of researchers from Indonesia and Singapore has found evidence of the continued existence of a bird long thought extinct. In their paper published in the journal BirdingASIA, the team describes the history of the bird, why it was thought to be extinct and how it was found in Borneo.

Back sometime between 1843 and 1848 a bird now called the black-browed babbler was captured by naturalist Carl A.L.M. Schwaner. Records of the find are sketchy, but it appeared the bird had been captured on the island of Java. That finding was the one and only piece of evidence of the bird's existence — it is currently labeled as "data deficient" in ornithology texts. The bird was put into storage, and for the next 170 years, there were no further reports of its existence. Over time, the bird and its history became known as "the biggest enigma in Indonesian ornithology." Most in the field assumed it had gone extinct. Then, last year, a pair of researchers, Muhammad Rizky Fauzan and Muhammad Suranto captured a bird that they could not identify on the Indonesian part of the island of Borneo. They took pictures of it and sent them to colleagues, then released the bird.

NASA is warning of the second 'stadium-sized' asteroid headed towards the Earth in as many weeks, shortly after announcing the postponement of its critical planetary defense mission to 2022.

On February 27, the asteroid 2021 DE, with a diameter roughly the same size as the Arc de Triomphe (49m), will buzz the Earth at a distance of 1.6 million kilometers (mn km), followed shortly afterwards on February 28 by the 20-meter 2021 DM at a distance of 4.8 mn km.

Upping the ante significantly the following day, March 1, will be the Statue of Liberty-sized (91m) space rock 2011 DW, which will shoot past at a distance of 5.3 mn km.

Then on March 2 comes the piece de resistance, the second asteroid in two weeks which NASA describes as 'stadium-size': 1999 RM45, with a diameter of 396m - roughly 1.1 times the height of the Empire State building, 1.75 times that of the Golden Gate Bridge, or 0.5 times the size of the Burj Khalifa - will pay the Earth a passing visit at a safe distance of 2.6 mn km.

First came the tree, all 19.5 metres of it, with roots and branches and leaves. Then, weeks later, the discovery of 150 fossilised logs, one on top of the other, a short distance away.

Nikolas Zouros, a professor of geology at the University of the Aegean, couldn't believe his luck. In 25 years of excavating the petrified forest of Lesbos, he had unearthed nothing like it.

"The tree is unique," he said. "To discover it so complete and in such excellent condition is a first. To then discover a treasure trove of so many petrified trunks in a single pit was, well, unbelievable."

In the unfolding extreme winter tragedy in Texas as well as many other regions of the United States not prepared for severe winter weather, a notable point is that much of the vast windmill batteries across the state, supposed to generate 25% of the state electric power grid, have frozen and are largely useless. The recent severe winter weather across not only the continental USA but also large parts of the EU, and even the Middle East, warrants a closer look at a subject that has been too long ignored by the UN Intergovernmental Panel on Climate Change (IPCC) reports, as well as by a new group of academics known as Climate Scientists. That is, the influence of our sun on global climate.

Cold Climate Change

On February 14 a record Arctic cold front swept from Canada far south to the southernmost parts of Texas on the Mexican border. The immediate impact has been power outages for up to 15 million Texans who as of February 17 remained without heat and electricity, as almost half the wind units were frozen and inoperable from ice storms, many permanently. Texas over the past five years has doubled its share of wind generation to the grid in a rush to adopt a green energy profile. With some 25% of the state electric grid from wind sources, almost half that is out of commission, many permanently, from the storm.

After traveling several billion miles toward the Sun, a wayward young comet-like object orbiting among the giant planets has found a temporary parking place along the way. The object has settled near a family of captured ancient asteroids, called Trojans, that are orbiting the Sun alongside Jupiter. This is the first time a comet-like object has been spotted near the Trojan population.

The unexpected visitor belongs to a class of icy bodies found in space between Jupiter and Neptune. Called "Centaurs," they become active for the first time when heated as they approach the Sun, and dynamically transition into becoming more comet-like.

Visible-light snapshots by NASA's Hubble Space Telescope reveal that the vagabond object shows signs of comet activity, such as a tail, outgassing in the form of jets, and an enshrouding coma of dust and gas. Earlier observations by NASA's Spitzer Space Telescope gave clues to the composition of the comet-like object and the gasses driving its activity.

"Only Hubble could detect active comet-like features this far away at such high detail, and the images clearly show these features, such as a roughly 400,000-mile-long broad tail and high-resolution features near the nucleus due to a coma and jets," said lead Hubble researcher Bryce Bolin of Caltech in Pasadena, California.

Describing the Centaur's capture as a rare event, Bolin added, "The visitor had to have come into the orbit of Jupiter at just the right trajectory to have this kind of configuration that gives it the appearance of sharing its orbit with the planet. We're investigating how it was captured by Jupiter and landed among the Trojans. But we think it could be related to the fact that it had a somewhat close encounter with Jupiter."

The team's paper appears in the February 11, 2021 issue of The Astronomical Journal.

The research team's computer simulations show that the icy object, called P/2019 LD2 (LD2), probably swung close to Jupiter about two years ago. The planet then gravitationally punted the wayward visitor to the Trojan asteroid group's co-orbital location, leading Jupiter by about 437 million miles.

When Josephine Ulrich and colleagues got the chance to work with the iDiv Ecotron, a system of experimental containers in Germany that lets researchers create and manipulate miniature ecosystems, they decided to investigate the effect of declining invertebrate populations on plant communities. Many studies have explored how projected changes in abiotic factors — rising temperatures, for example — influence plants, says Ulrich, a PhD student at the German Centre for Integrative Biodiversity Research (iDiv) and Friedrich Schiller University, but to look at biotic factors such as invertebrate loss is a new approach.

To come into being, galaxies need a steady diet of cold gases to undergo gravitational collapse. The larger the galaxy, the more cold gas it needs to coalesce and to grow.

Massive galaxies found in the early universe needed a lot of cold gas — a store totaling as much as 100 billion times the mass of our sun.

But where did these early, super-sized galaxies get that much cold gas when they were hemmed in by hotter surroundings?