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Mars may be hostile, but it might not be entirely unlivable. In lab experiments, yeast cells survived simulated Martian shock waves and toxic perchlorate salts—two major environmental threats on the Red Planet. Their secret weapon was forming protective molecular clusters that shield critical cellular functions under stress. Without these defenses, survival plummeted, pointing to a potential universal strategy life could use beyond Earth.

A major international effort has produced an ultra-precise measurement of the Universe’s expansion rate, confirming it’s faster than early-Universe models predict. By linking multiple distance-measuring techniques, scientists ruled out simple errors as the cause of the discrepancy. The persistent “Hubble tension” now looks more real than ever. It could mean our current model of the cosmos is incomplete.

A brilliant physicist vanished in 1938, leaving behind one strange, quiet paper. It described something that shouldn't exist: a particle that is its own antiparticle. To understand why that matters, we first need to rethink what a particle even is — and that means getting weird with chirality, the Higgs field, and the neutrino's stubborn refusal to follow the rules.

In my view, “Blackbird,” a Beatles song written by Paul McCartney and released on the Beatles’ “White Album” in November, 1968, is one of his finest works.  Here we see him rehearsing it in the the EMI’s Abbey Road Studios on the very day it was recorded: June 11, 1968. (The released version is here.)

A few notes on the song from Wikipedia:

McCartney explained on Chaos and Creation at Abbey Road that the guitar accompaniment for “Blackbird” was inspired by Johann Sebastian Bach’s Bourrée in E minor, a well-known lute piece, often played on the classical guitar. As teenagers, he and George Harrison tried to learn Bourrée as a “show off” piece. The Bourrée is distinguished by melody and bass notes played simultaneously on the upper and lower strings. McCartney said that he adapted a segment of the Bourrée (reharmonised into the original’s relative major key of G) as the opening of “Blackbird”, and carried the musical idea throughout the song. The first three notes of the song, which then transitioned into the opening guitar riff, were inspired from Bach.

The first night his future wife Linda Eastman stayed at his home, McCartney played “Blackbird” for the fans camped outside his house.

. . . Since composing “Blackbird” in 1968, McCartney has given various statements regarding both his inspiration for the song and its meaning.  He has said that he was inspired by hearing the call of a blackbird one morning when the Beatles were studying Transcendental Meditation in Rishikesh, India, and also writing it in Scotland as a response to the Little Rock Nine incident and the overall civil rights movement, wanting to write a song dedicated to people who had been affected by discrimination.

You can listen to Bach’s Bourré here, but for the life of me I can’t hear the germ of “Blackbird” in it.

The sound is off at the beginning but starts 16 seconds in. There are a few other breaks in the sound.

It’s clear that the song was tweaked right up to the end, including the tempo, the pause, and the raising of the voice on the word “life” halfway into the song.

The guy speaking to John and Paul is of course George Martin, who contributed so much to the greatness of the group’s songs.  Notice that Paul breaks into other songs from time to time, including Helter Skelter and Mother Nature’s Son, both also on the White Album. At about 6:15, Lennon tunes his guitar to McCartney’s, as if wanting to accompany him on Blackbird. But no accompaniment was needed.

Check out Macca’s shoes! The woman sitting in the corner and then next to McCartney is identified by a commenter:

Francie Schwartz is the lady appearing in the video alongside Paul. She was Paul McCartney’s girlfriend during the summer of 1968, which coincides exactly with the White Album recording sessions. She wrote about her time at Abbey Road in her memoir Body Count (1972), giving a firsthand account of those legendary sessions. You can read about Schwartz here.

This is McCartney at the apogee of his powers. The song is a work of genius.  In all my life I will never figure out where the ability to produce songs like this comes from. All I can guess is that there’s a kind of neuronal wiring in such people that can turn thoughts into wonderful music.

The next time these doctors claim they were right, let's remind them exactly what they claim to have been right about.

The post Since They Won’t Remind You, Here’s What Drs. John Ioannidis, Jay Bhattacharya, and Scott Atlas, Actually Said 6 Years Ago first appeared on Science-Based Medicine.

Larry the Cat recently turne 19 (and celebrated his 15th year at 10 Downing Street), but the Senior Cat is still going strong. For example, he recently caught his third mouse, though that was nominally his job as Chief Mouser to the Cabinet Office.  All Brits love him now (save for the miscreants), and he’s still getting into trouble, as this recent YouTube video shows:

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Quite a few readers called my attention to this Canadian cat, named Louis Vuitton (!), who lives in a town that straddles the border with the U.S. Despite new restrictions on immigration, Louis, as the CBC article below shows, repeatedly enters the U.S. illegally and then slips back to Canada. Click on the headline to read:

An excerpt:

On Zero Avenue in South Surrey, B.C. lives a cat without a care in the world, and a supercilious name to match.

Louis Vuitton has become a local legend for doing with ease what most humans wouldn’t dare.

Each day, he leaps back and forth across a narrow ditch that sits smack dab on the Canada-U.S. border.

“He hasn’t always been such a rebel, but he is extremely friendly,” Deb Tate, Louis’ owner, told As It Happens host Nil Koksal.

He just loves people, says Tate, and he doesn’t care what side of the border they’re on.

“He will walk up, greet people, get his pats and belly rubs and then continue on when he’s done.”

On one side of the ditch is a row of charming homes, including his own, on Canadian soil. On the other are the green fields of Peace Arch Historical State Park in the United States.

There aren’t any fences, just a street in between and a shallow divide. According to Tate, there are plenty of cameras and hawk-eyed border guards patrolling nearby, ready to pounce on illegal crossers.

But none of that seems to concern Louis, who trapezes across whenever he wants, with the air of someone who knows the rules, and chooses to ignore them.

Louis, who turns six on Canada Day,has been lapping up all the attention from locals since he caught the eye of Instagram user @pnwdaily360, who posted a now viral video about “the border-hopping kitty.”

There’s a cat that doesn’t really give a f–k about borders,” says the user in the video. “And he comes over and hunts in the ditch. There he is. What’s up buddy?”

The video has since garnered over 220,000 likes and three million views on Instagram.

Tate says Louis even has a habit of smuggling things across the border, dropping it ever so thoughtfully on her doorstep.

“He’s been known to bring home a treat or two from his adventures,” said Tate. “We’ve received everything from snakes and mice and squirrels, much to my chagrin.”

As for his name, Tate says it wasn’t given to him because he has a penchant for luxury goods at duty-free prices.

“He’s a rescue kitty, and we decided that coming from humble beginnings, he deserved a designer name,” said Tate. “We just named him Louis and … he has just grown in to fill the personality, and more.”

Click the video below to see a two-minute video of Louis in action.  I wonder if ICE will go after him. After all, he not only enters the U.S. illegally, but commits crimes (murder!) in our country, bringing mice, snakes, and even squirrels back to Canada.

 

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Finally, from 1000 Libraries Magazine we hear about a cat who got an honorary doctorate from a university in Vermont, so he is now known as “Dr. Max Dow.”  Click the screenshot below to get the details:

An excerpt:

That’s Dr. Max Dow, to you. Max Dow, a once feral kitten, has been granted an honorary PhD from Vermont State University Castleton. After making a name for himself around campus for the last five years, Max has become a staple on the grounds and a famously friendly mascot for the school. He is beloved by students and faculty alike — so much so, the university bestowed an honorary doctorate of ‘litter-ature’ to him at this year’s commencement ceremonies.

Much like many other great scholars, Max’s life started with humble beginnings. He was living on the streets of a neighboring city in Vermont as a feral kitten before being adopted by his loving family and owner, Ashley Dow. Dow and her family live in a neighborhood shared with Vermont State University Castleton, and about a year after moving into their new home, Max began to explore the campus for the first time.

In an interview with USA Today, Ashley Dow shares the first memories of Max making his way to campus. She and her family were worried when he hadn’t returned home. They went searching for Max and quickly found that he was exploring the university and was familiarizing himself with curious students and staff.

Max is well taken care of by students, much to the relief of his owner. Students have been responsible for looking out for Max’s well-being and regularly check in with his owners about his health and safety. Many residents on campus have Dow’s number and will send her update texts when Max is seen or is being cared for by a student or faculty member. After a run with some not-so-friendly stray cats in the neighborhood, Max was injured.

In response, Dow asked the school’s faculty and students to be vigilant about returning Max home by 5:00 PM so his family could keep an eye on him during the night. She shared that everyone has complied with her request on numerous occasions and goes out of their way to make sure he is looked out for when he’s around campus.

. . . Max has benefited from the many perks of being a ‘student’ on campus. According to Vermont State University, Max can be seen hitching rides across school grounds in students’ backpacks and has even been the artistic muse and subject of many photography major projects.

. . . After five years of dedication to Vermont State University and its students, the school decided it was time for Max to earn his degree. During the Spring 2024 commencement, Max was celebrated and met with applause when he earned his doctorate in “Litter-ature” alongside over 1,000 other students.

. . . Vermont State University shared their feelings about Max in one quote saying, “We are incredibly proud of Max and deeply grateful for the role he plays within the culture of our University and for his part in elevating VTSU’s reputation for academic excellence and outstanding commitment to animal welfare.”

Here’s Max’x doctoral diploma from the site:

. . . and a short video about Max—I mean Doctor Max.

I hope he’s chipped.

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Lagniappe: From Stacy, a post from the FB Group the National Carousel Association:

Extra lagniappe from Cats Doing Cat Stuff. Safe treats for your moggy:

Today’s we have photos from Ephraim Heller of hummingbirds from Trinidad and Tobago.  Ephraim’s captions and IDs are indented, and you can enlarge his photos by clicking on them.

On my February visit to Trinidad and Tobago I managed to photograph 13 of the 18 hummingbirds that are sometimes present on the islands. Previous posts were devoted to my new favorite bird, the tufted coquette (here) and to photos of six other species (here). This post covers the remaining six species. The species that I did not photograph either do not visit feeders or are only present seasonally in the country.

Black-throated mango (Anthracothorax nigricollis). Some individuals have been documented to migrate over 1,000 miles:

Blue-chinned sapphire (Chlorestes notata):

Brown violetear (Colibri delphinae). An aggressive species that zealously defends its nectar sources:

The copper-rumped hummingbird (Saucerottia tobaci) is the most common hummingbird on both islands. An individual amused me over several days as it vigorously defended three feeders from all species, regardless of the fact that food was plentiful:

When light hits the male ruby-topaz hummingbird (Chrysolampis mosquitus) just right it lights up like a neon sign. As in many other hummingbird species, the male’s crown and throat produce color not through pigment but through the physical structure of the feathers: stacked layers of melanin granules in the barbules:

White-chested emerald (Chrysuronia brevirostris). Males and females look alike:

The astronauts of the Artemis II mission around the moon have made it home safely to Earth, marking the end of a triumphant mission and the beginning of a longer road to stay on the moon

Artemis II returns today, if everything works okay. As I’ve said, there are some concerns about the heat shield, but not serious concerns. The space.com article below (click on it to read) gives the details as well as several links. I’ve put its video link (the best one, I think) below. Be sure to watch it live starting about 7:40 this evening, Eastern time, as several events will occur at or during re-entry.

Jim Batterson sent this link and added a few words:

In particular item #14 talks about their egress and being carried to the Navy recovery ship by helicopter.  After the crew are safe on board the ship, I think that the capsule is simply retrieved into the ship’s onboard “well”.  The astronauts are then helicoptered to firmer terra firma.

A short excerpt:

The Artemis 2 Orion capsule will return to Earth tonight, April 10, at 8:07 p.m. EDT (0007 April 11 GMT) with a splashdown in the Pacific Ocean off the coast of San Diego, California. Returning home on the ship to end a 10-day trip to the moon are NASA astronauts Reid Wiseman (commander), Victor Glover (pilot), Christina Koch (mission specialist) and Canadian Space Agency astronaut Jeremy Hansen (mission specialist). You can watch the landing live on Space.com, beginning at 6:30 p.m. EDT (2230 GMT). You can also follow the mission live online on our Artemis 2 mission updates page.

After an epic trip to the moon and back, it’s landing day for the four astronauts of NASA’s Artemis 2 mission. For the first time in over 53 years, astronauts are returning to Earth from the moon.

But returning from deep space is no easy feat, especially for the Artemis 2 astronauts, who are the first crew to fly on NASA’s Orion spacecraft. The most harrowing part of the journey lies ahead: a fiery 13-minute plunge through Earth’s atmosphere at about 24,000 mph (38,600 kph) that will subject them to temperatures of up to 5,000 degrees Fahrenheit (2,760 degrees Celsius) with only their heat shield for protection and parachutes to slow down.

“Every system we’ve demonstrated over the past nine days — life support, navigation, propulsion, communications — all of it depends on the final minutes of flight,” NASA Associate Administrator Amit Kshatriya told reporters Thursday (April 9). “We have high confidence in the system, in the heat shield, and the parachutes and the recovery system that we’ve put together.”

Watch it all below:

A class of undergraduate students at University of Chicago has used data from the Sloan Digital Sky Survey (SDSS) to discover one of the oldest stars in the universe, a star that formed in a companion galaxy and migrated to the Milky Way.

Some cats will suddenly refuse to touch brands of cat food that they have eaten for years. Changing the way the food smells might solve the problem

The two largest planets in our Solar System, Jupiter and Saturn, have the largest systems of moons. However, Jupiter has more large moons than Saturn, which has only one. Since both planets are gas giants, the reasons for the differences in these satellite systems have long puzzled astronomers. This motivated a collaborative team of researchers from Japan and China to develop a physically consistent model that can explain this.

A handful of plankton fossils buried in a small chunk of rock show that the oceans were teeming with life before the Late Ordovician mass extinction, the second most severe on record

According to theory and models of planet formation, large gas giants should form around massive stars. That's because massive stars have more massive protoplanetary disks. But astronomers have the opposite arrangement in some cases. New research highlights a massive gas giant on a close-in orbit around a low-mass M-dwarf, and it poses another challenge to our understanding planet formation.

Working in secret for more than two years, a group of mathematicians has set out to resolve of the longest and most bitter battles in modern mathematics

For the first time ever, I visited Whole Foods in Hyde Park, as I was craving matzos for Passover and it was the only place that carried them. (Trader Joe’s, for instance, was sold out and wasn’t getting any until 2027.)  Since Passover ended yesterday, nearly every place was sold out for the holidays.

Over my entire life, I’ve avoided Whole Foods for two reasons: it’s very expensive and also carries homeopathic remedies, which I despise as they’re totally ineffectual.

But the craving for matzos (I eat them spread with good sweet butter) drove me on.  My haul is below, acquired on the advice of a friend. The matzos are not kosher for Passover, but of course I don’t care about that. And I was told that Kerrygold butter from Ireland is about the best you can buy, so I got two sticks of that to smear on the matzos.  Finally, there’s a small jar of tart cherry jam made by Dalmatia and imported from Croatia, also recommended by my food-savvy friend.

Yes, the place is expensive, and walking there and back took 1.5 hours given the fact that no employee seemed to know where anything was. The jam, for instance, is not with the other jellies and jams, but for some reason was put at the cheese counter. Nobody knew where the matzos were, so I had to ask about five people. (I should add that Whole Foods employees at the Hyde Park store are not very friendly, especially when compared with workers at Trader Joe’s, who are always helpful and amiable.) Fortunately, the Irish butter was in the dairy section where it should be.

This is all the makings of a fine snack!

Whoops! I forgot to add that gas prices in Chicago seem to be about a dollar higher than the average across the rest of America. Here’s a photo from my trip to Whole Foods:

Space is getting crowded - and not just with satellites, but with the massive amounts of data they’re generating. The amount of information being generated and passed through orbit is exploding. From high-resolution Earth observation images to global maritime monitoring, it’s also become a critical link in our infrastructure. But there’s another space this growing crowd of satellites is dependent on that is also filling up fast - the radio frequency spectrum. If we want to keep expanding our orbital infrastructure, we need to rethink how we move data around. On March 30, 2026, the European Space Agency (ESA) supported a series of eight CubeSats and one specialized payload on SpaceX’s Transporter-16 rideshare mission with the overarching goals of testing high-throughput laser communication, inter-satellite networking, and in-orbit artificial intelligence processing to make space data transfer faster, more secure, and vastly more efficient.

My insomnia continues, and has apparently worsened for reasons I don’t understand. Perhaps it’s anxiety about the war, but it’s definitely anxiety about something. Perhaps subliminal anxiety—after all, we can’t control what our brain does.  Last night I woke up at 2 a.m. and couldn’t get back to sleep. When this happens nearly every night, I try to suppress the worries that arise almost—like everyone, I have a panoply of items on the worry list. But anxiety seeps in and keeps me awake. AT 4 a.m., I hauled my sorry tuchus out of bed, did my ablutions, and came to work. That is the usual situation.

If I were to guess at the items that make me most anxious (besides the worry about getting back to sleep, which is counterproductive), there are these:

The Middle East.  Because I post daily about the war in Iran and other Middle Eastern matters, I seem to have gotten caught up in the roller coaster that is this region of the world, a roller coaster exacerbated by Trump’s waffling, which may be a deliberate strategy.  Regardless, like the mess that is American politics now, I realize that there’s little I can do to affect matters. And given that, I should simply observe the situation, express my opinion when I can, but not get so engaged that I’m destabilized by the ups and downs of both the war and politics.  But in this I’ve failed.

The ducks at Botany Pond.  I should just do what I can to take care of them, including feeding the ducklings when they come, but caring for them has almost become an obsession.  “No ducklings left behind” is my motto.  There’s nothing I can do to stave off most predators or prevent errant mallards from entering the pond and harassing Vashti, but somehow it’s a constant anxiety until the ducklings grow up and fly away.

Death.  I guess a lot of readers don’t worry about their mortality, but when you get into your seventies it’s almost inevitable. I’ve already lost several friends and classmates, and of course, as the syllogism goes, all men are mortal.

In response, some people have said that because they don’t worry about the time before they were born, which they equate with the time after they die, it’s futile to be afraid of death. In response to that I quote Christopher Hitchens, who knew he was dying of cancer but never openly admitted it:

“It will happen to all of us, that at some point you get tapped on the shoulder and told, not just that the party’s over, but slightly worse: the party’s going on — but you have to leave. And it’s going on without you. That’s the reflection that I think most upsets people about their demise.”

I once asked readers if they wanted to be immortal (with the stipulation that you don’t fall apart completely), and most said “no”—they will have seen enough of life when the Reaper comes. But I like the party too much!

Scientists have proposed a surprising new way to detect gravitational waves—by observing how they change the light emitted by atoms. These waves can subtly shift photon frequencies in different directions, leaving behind a detectable signature. The effect doesn’t change how much light atoms emit, which is why it’s gone unnoticed until now. If confirmed, this approach could lead to ultra-compact detectors using cold-atom systems.

Scientists have proposed a surprising new way to detect gravitational waves—by observing how they change the light emitted by atoms. These waves can subtly shift photon frequencies in different directions, leaving behind a detectable signature. The effect doesn’t change how much light atoms emit, which is why it’s gone unnoticed until now. If confirmed, this approach could lead to ultra-compact detectors using cold-atom systems.