All posts by Cathy Palmer-Lister

Concrete that can grow and heal itself

Franken-concrete comes to life to create self-healing buildings.

A team of American researchers has developed a new kind of biological concrete that could redefine what we mean by “green buildings.”

The concrete, developed by researchers at the University of Colorado, Boulder, uses bacteria as a binder. This leads to a material that can grow and even heal itself — much like a living organism.

An arch made from living building materials, next to the bacteria used to make it. (CU Boulder College of Engineering & Applied Science)

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In traditional concrete, sand and aggregate are bonded together with cement.

In this biological concrete, photosynthetic cyanobacteria take the place of cement. The bacteria use carbon dioxide from air to produce a material similar to limestone that glues together sand particles, making robust building blocks.

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Four strange new objects found around the Milky Way’s huge black hole

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The dust-shrouded objects may be binary stars merging as they orbit the supermassive black hole in our galaxy’s core.
RELATED TOPICS: MILKY WAY | BLACK HOLES | STARS
GalacticCenterGObjects
An illustration of the orbital paths of the six known G-objects around the supermassive black hole in the center of the Milky Way. Anna Ciurlo, Tuan Do/UCLA Galactic Center Group
Astronomers have discovered four new and mysterious objects orbiting the Milky Way’s supermassive black hole, Sagittarius A*. The bizarre objects look a lot like common clouds of gas and dust, but they surprisingly manage to stay compact like stars as they run laps around our galaxy’s gargantuan black hole.The quartet of new objects share striking similarities with two others, dubbed G1 and G2, that were found in the past 15 years or so. This has led researchers to conclude the four new bodies likely belong to the same class of objects as G1 and G2, which are simply referred to as G-sources or G-objects.

Researchers don’t yet know exactly what these G-objects are, but they think the strange bodies might be binary stars in the process of merging.

Second terrestrial planet found around closest star to the Sun

Located just 4.2 light-years away, the star Proxima Centauri now has both an Earth-like world in its habitable zone and a more distant super-Earth.

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proximac
This artist’s concept shows the Proxima Centauri system, including the roughly Earth-sized planet Proxima b (left) and the super-Earth planet Proxima c (right). According to new research, Proxima c has a minimum mass of about 6 Earth masses, and it orbits its red dwarf host star once every 5.2 years — Lorenzo Santinelli

Our nearest celestial neighbor, the star Proxima Centauri, likely has a second planet.

The planet, dubbed Proxima c, is at least about 6 times the mass of Earth and orbits its tiny red dwarf host once every 5.2 years. If confirmed, the newly discovered super-Earth would be the second terrestrial world found in the Proxima Centauri system, which is located just 4.2 light-years from Earth.

According to the researchers, the discovery of Proxima c could provide insights into how low-mass planets around low-mass stars form, especially when the planets begin their lives well beyond a star’s “snow line,” where water turns to solid ice.

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Designs for the future

MonSFFA is planning presentations on mega cities, designs for the future–the dreams we had in the past, the dreamers of today.

In today’s Montreal Gazette there was an article about future transportation: Flying taxis & rail loops with cities for stops .

I found a video for the flying Uber here.

TRANSPORT’S FUTURE IS NOW IN CALIFORNIA
 Uber Air is testing its flying taxi service in San Diego and will launch services in 2023 in Los Angeles, Dallas and Melbourne.

This city sprawls across five counties with an exploding population of 14 million. Its roads are now so choked that this fall Uber, Lyft and taxis were banned from picking up people at its crowded airport. Now arriving passengers must wait, then board shuttle buses to go to remote parking lots to find rides.

TOMOHIRO OHSUMI/BLOOMBERG FILES The transition to autonomous or self-driving cars is gathering speed, and flight and rail are on their way to being transformed. Uber Air plans to launch its flying taxi service in 2023 in Los Angeles, Dallas and Melbourne. The EVTOLs, or electrically powered vertical take-off and landing drones, will make short-haul flights at low altitudes.

So it’s hardly surprising that California is where 22nd century transportation modes are being invented. And those of us at this week’s high-level Abundance360 conference hosted by tech pioneer (and a friend) Peter Diamandis learned that the “robots” that will transport us and everything are coming in a handful of years.

The transition to autonomous or self-driving cars gathers speed. They are permitted in 29 states, with testing permits, while Tesla and others offer partial self-driving features with drivers onboard. But by the end of 2020, Elon Musk will roll out a fully automated version of Tesla which, he claims, will prove that such cars are three to four times safer than human drivers.

With trust in the tech, adoption will leap. Cars or drones on wheels will drive the elderly to doctor’s appointments or children to school or commuters to work while they work or watch television or sleep.

Besides that, flight and rail will also be transformed. Uber Air is testing its flying taxi service in San Diego and will launch services in 2023 in Los Angeles, Dallas and Melbourne. Most important, the FAA, or Federal Aviation Administration, has given a theoretical green light for these low-altitude commuter services along selected air routes, pending trials.

Uber will offer short-haul flights at low altitudes between sky ports that will be built or added on to existing rooftops, vacant parking lots, stadiums, or highway interchanges. Uber plans to take cars off the road and keep costs low by “batching” passengers. People will be picked up and ride-share in vehicles to a sky port for departure, then fly and ride-share from the sky port to their work destinations. The process will be reversed at the end of the workday.

“These are not helicopters, which are unsafe, noisy and expensive,” said Nikhil Goel, head of product development at Aviation Uber. They are EVTOLs, or electrically powered vertical take-off and landing drones, with noise-proof rotors that allow them to vertically take off, then fly between sky ports.

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“A helicopter cost is $10 per mile,” he said, “but with batching (of passengers) to and from sky ports we can get that cost down to $1.50 per mile.”

The ultimate goal is to get cars off the road by making it faster and cheaper to fly than to own a car to commute. Last year, billions were raised for development by various companies and the first one was listed on Nasdaq. Joint ventures between flying car companies like Uber and Joby and giant automakers like Hyundai and Toyota are moving quickly.

“It’s two hours from JFK Airport to Manhattan by car and less than 10 minutes flying,” said Goel.

Such aircraft will also be able to carry cargo and to deliver emergency supplies or ambulance services quickly.

Another Los Angeles pioneer is Virgin Hyperloop One, which will revolutionize railways by moving passengers and freight through concrete tunnels at the speed of aircraft.

Virgin’s CTO Josh Giegel said the company is working on nine projects and 400 test pilots, and expects several lines to be built this decade. These rail systems will link cities, and could be tunnelled, or built above ground along existing highway medians.

“Hyperloop would turn cities into stops,” said Giegel. “For instance, Chicago, Columbus and Pittsburgh would be 30 minutes apart.”

These companies will allow cities to reach their goal of getting cars off the road this decade. The only obstacle in their path will be political will and foresight.

Christopher Tolkien (1924-2020)

Christopher Tolkien has passed away. Obituary below is copied from Locus Magazine.

Author and editor Christopher Tolkien, 95, son and literary executor of J.R.R. Tolkien, died January 15, 2020 in Provence, France. Tolkien dedicated his life to his father’s work, editing and shepherding into print more than a score of the elder Tolkien’s books. He organized and edited the The Silmarillion (1977), Unfinished Tales (1980), and the 12 volumes of The History of Middle-earth (1983), along with The Children of Húrin (2007), The Legend of Sigurd and Gudrún (2009), The Fall of Arthur (2013), Beowulf: A Translation and Commentary (2014), Beren and Lúthien (2017), and The Fall of Gondolin (2018). He was chairman of the Tolkien Estate, Ltd. and a trustee of the Tolkien Charitable Trust. He also drew the iconic map of Middle-earth included in the 1954 edition of The Lord of the Rings, and the updated 1970s version. He retired as director of the estate in 2017.

It is an excellent remedy for the problem of blood pressure can lead appalachianmagazine.com purchase levitra to erectile dysfunction. However, these drugs should not be taken more than once viagra prices canada a day. By now the household tend to be operating in most ways other this page generic viagra online than normal. And males with low libido due to buy cheap levitra variety of factors ranging from stress to diabetes mellitus. Christopher John Reuel Tolkien was born November 21, 1924 in Leeds, England. He served in the Royal Air Force during World War II. Afterwards, he received a degree in English from Trinity College and later was a lecturer and tutor at New College, Oxford. Tolkien received the 2017 Bodley Medal in part for his work editing the unpublished texts of his father. The medal was given by the Bodleian Libraries at Oxford University, where the Tolkien Archive has been housed since 1973.

Tolkien was to married to Faith Faulconbridge from 1951-1967 and they had one child, Simon. He remarried the same year to Baillie Klass, with whom he had two children, Adam and Rachel. Tolkien eventually moved with his family to France and became a citizen there. He is survived by his wife, sister Priscilla, and three children.

R2D2 Tiffany lamp

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Scientists find meteorite pieces older than the solar system

Scientists find meteorite pieces older than the solar system

Some of the ancient grains may have been created by a boom in stars forming in the Milky Way about seven billion years ago.

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RELATED TOPICS: METEORITES | ASTEROIDS | SOLAR SYSTEM
Image3_Grains_with_Egg_Nebula_grey
The Egg Nebula, a cloud of material that blew off of a matured star, has large dust grains that may be like the silicon carbide minerals found in meteorites. Image of Egg Nebula: NASA, W. Sparks (STScI) and R. Sahai (JPL); Inset image: Janaína N. Ávila
In pieces of a meteorite, scientists have found tiny mineral grains that are older than the Sun and the solar system, which formed about 4.6 billion years ago. Some of these “presolar grains,” the researchers found, are between five and seven billion years old, making them the oldest known materials on Earth.The grains initially formed in interstellar space out of material ejected from mature stars that condensed into dust. The researchers who identified the grains think many of them likely were created following a boom in star formation the Milky Way experienced some seven billion years ago. If confirmed, the new finding demonstrates that researchers can study meteorites to better understand the history of star formation in our galaxy.

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Fanzine to share!

From Felicity Walker, The Newsletter of the British Columbia Science Fiction Association

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Ignore the date–Felicity is almost a year behind but still hoping to catch up.

Locus Book Reviews

Locus Looks at Books

These books and magazines are reviewed in the February 2020 issue, and will appear online a month or two after that.

Since the Locus reviewers rarely if ever review books they don’t like, you can think of this list as recommended reading — CPL

Asimov’s 1-2/20
Analog 1-2/20
Lady Churchill’s Rosebud Wristlet 11/19
On Spec #112
Clarkesworld 12/1919
Beneath Ceaseless Skies 10/24/19, 11/21/19
Strange Horizons 10/19, 11/19
Mithila Review 12/19
Mysterion 11-12/19
Sirenia Digest #164, #165, #166
Black Static 11-12/19
The Dark 11/19, 12/19
Uncanny 11-12/19
Nightmare 12/19
Beneath Ceaseless Skies 12/5/19
The City We Became, N.K. Jemisin
The Hidden Girl and Other Stories, Ken Liu
The Water Dancer, Ta-Nehisi Coates
Talk Like a Man, Nisi Shawl
Gravity of a Distant Sun, R.E. Stearns
Docile, K.M. Szpara
A Queen in Hiding, Sarah Kozloff
The Queen of Raiders, Sarah Kozloff
A Broken Queen, Sarah Kozloff
The Cerulean Queen, Sarah Kozloff
Sea Change, Nancy Kress
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Turning Darkness into Light, Marie Brennan
Chilling Effect, Valerie Valdes
One Bronze Knuckle, Kenneth Hunter Gordon
False Value, Ben Aaronovitch
The Freedom Artist, Ben Okri
Bridge 108, Anne Charnock
The Resisters, Gish Jen
…And Other Disasters, Malka Older
The Queen of Nothing, Holly Black
The Thief Knot, Kate Milford
Reverie, Ryan La Sala
I Hope You Get This Message, Farah Naz Rishi
Trinity Sight, Jennifer Givhan
Hollow Kingdom, Kira Jane Buxton
Mazes of Power, Juliette Wader
Hidden Wyndham: Life, Love, Letters, Amy Binns
Suicide Woods, Benjamin Percy
War Girls, Tochi Onyebuchi
The Time Machine, H.G. Wells, illustrated by Ale + Ale
Invented People: Vol. 1, Rick Berry
LaGuardia, Nnedi Okorafor, adapted by Tana Ford & James Devlin
The Handmaid’s Tale: The Graphic Novel, Margaret Atwood, adaptation and art by Renée Nault
Starport, George R.R. Martin, adaptation and art by Raya Golden
Stanislaw Lem’s The Seventh Voyage, Jon J. Muth
Dracopedia Field Guide, William O’Connor
The Necronomnomnom, Mike Slater, Thomas Roache, ed.
Zintara and the Stones of Alu Cemah, Michel & Dominic Bohbot
Star Wars: Women of the Galaxy, Amy Ratcliffe

Obituaries: Stiles, Resnick, Peart

Locus Magazine has published obituaries on line for :

  • Steve Stiles
  • Mike Resnick
  • Neil Peart

Steve Stiles (1943-2020)

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Artist Steve Stiles, 76, died January 12, 2020 shortly after announcing a diagnosis of terminal cancer. He lived in Maryland. Stiles was one of fandom’s best-known artists, first nominated for a Best Fan Artist Hugo in 1967, and winning in 2016; he received 17 nominations in all. He won 15 FAAn Awards for his fanzine work (the first in 2001, the last in 2016), and in 1998 won the first ever Rotsler Award for lifetime achievement in fan art. He also did professional artwork, including in comics.  READ MORE

Mike Resnick (1942-2020)

Author Mike Resnick, 77, died January 9, 2020 of lymphoma. Resnick was a prolific and acclaimed SF, nominated 27 times for Hugo Awards and winning five. His Hugo Award winners include his first nomination “Kirinyaga” (1988), “The Manamouki” (1990), “Seven Views of Olduval Gorge” (1994), “The 43 Antarean Dynasties” (1997), and “Travels with My Cats” (2004), and his most recent fiction nomination was for “The Homecoming” (2011). His winners and nominees appear in Win Some, Lose Some: The Hugo Award Winning (and Nominated) Short Science Fiction and Fantasy (2012). He was a finalist for 11 Nebula Awards, and won for “Seven Views of Olduvai Gorge”. In all, he produced over 70 novels, more than 25 collections, hundreds of stories and articles, and edited over 40 anthologies. In 1995 he received a Skylark Award. READ MORE

Neil Peart (1952-2020)

Author and legendary Rush drummer and lyricist, Neil Peart, 67, died on January 7, 2020, after a long struggle with brain cancer.

With his grand, imaginative lyrics Peart helped usher in an entirely new genre of Progressive Rock music inspired by science fiction and fantasy. He wrote immense and lengthy musical epics such as dystopian science fiction “2112”, sweeping fantasy such as “Xanadu” and “The Necromancer”, and hard science fiction such as “Cygnus X-1” and “Hemispheres.” The last Rush album Clockwork Angels (2012) is a steampunk fantasy adventure with airships, alchemy, pirates, and lost cities. Peart worked with Kevin J. Anderson on the novel version of Clockwork Angels, which was a New York Times bestseller and Scribe Award winner, and follow-up novel Clockwork Lives (winner of the Colorado Book Award). Anderson and Peart adapted both works into graphic novels.  READ MORE