What KIC 8462852 Says About Us

Dyson sphereKIC 8462852. Hardly a household name. But it may be, one day soon, or at least when it garners a more prosaic name. It’s a star and it sits rather forlornly in space in the rightmost edge of the constellation Cygnus, almost 1,500 light years away. And although it’s too dim to be seen by the naked eye, it has caught the attention of astronomers and conspiracy theorists alike, worldwide.

KIC 8462852 is a mature F3-class sun, more massive than the Sun and both brighter, hotter. It’s the kind of sun we usually search for habitable planets around, at least within the range of potential candidates. But it’s been watched for the past six years with growing fascination and wonder. As Science Alert tells us:

It was first discovered by NASA’s Kepler Space Telescope in 2009, and scientists have been tracking the light it emits ever since, along with the light of another 150,000 or so newly discovered stars. They do this because it’s the best way to locate distant planets – slight, periodic dips in a star’s brightness signal the fact that it might have one or more large objects orbiting it in a regular fashion.
These brightness dips are usually very slight, with the stars dimming by less than 1 percent every few days, weeks, or months, depending on the size of the planet’s orbit.

That dimming is usually regular and explicable, and small. Not so with KIC 8462852. Its brightness has dipped inexplicably in large amounts with unnerving regularity, every 750 days, reaching levels of 15% and even 22% reduction of light for between five and 80 days.

Scientists scratch their head and wonder what could be large enough to diminish the light from a bright star by that amount. No planet could ever be that big. And it would have to be an enormous cloud of space junk – an improbable amount in a very tight formation – to do it.

Continue reading “What KIC 8462852 Says About Us”

Books versus E-readers

Books vs ereaderBack in February, Naomi Baron wrote a piece calledReading on-screen versus on paper,” in which she compared the two reading experiences: printed books and e-readers in five areas:

  • Cost
  • Container vs content
  • Environmental impact
  • Quality of screens
  • Concentration

Baron actually looks at these as true-or-false questions, not really comparisons. She doesn’t address issues like aesthetics, tactile sense or emotional response, or the relative value of hypertext to content, nor does she tread into the science and ergonomics of reading. For that, you have to look elsewhere. Which, of course, I did.

First let me state that it is not really an us-vs-them situation: e-readers vs printed books. Both technologies co-exist quite comfortably and each has its own merits. Neither will displace the other, and our civilization cannot survive with only digital content.*

Several Pew Research studies have shown that the number of Americans owning e-readers is still modest (24 percent by the end of 2013 but 32 percent by Jan. 2014; compared with tablet ownership which was at 42 percent by 2014) and the number of adults who had read an e-book within the previous year was a mere 28 percent with only 4 percent reading e-books exclusively (up to 5 percent by 2014). That, however, is a slowly growing figure.**

Continue reading “Books versus E-readers”

Fishy Thoughts

Nat PostCanadians, the headline reads, now have shorter attention span than goldfish thanks to portable devices. The story in today’s National Post underscores a growing problem that is fuelled by technology: our dwindling attention spans.

The Microsoft study of 2,000 Canadians found our collective attention span has dwindled to a mere eight seconds, down from an already embarrassing 12 seconds a similar study found back in the year 2000.

Goldfish have an average nine second attention span.

Eight seconds! How can you read a newspaper article, let alone a novel, with such a short attention span? How can you write or create anything of consequence with your mind flitting about like that?

The Ottawa Citizen quoted from the report:

“Canadians with more digital lifestyles (those who consume more media, are multi-screeners, social media enthusiasts, or earlier adopters of technology) struggle to focus in environments where prolonged attention is needed.”

Which explains why distracted driving – drivers on cell phones or texting at the wheel – is fast growing to be the number one cause of accidents and fatalities. Yet every day I walk my dogs or when we walk downtown, I see someone talking on the cell phone or texting while driving. Every day.

It also explains why many people fall for conspiracy theories, religious cults, advertising scams or the diaphanous piffle of local bloggers: they don’t have the attention span required to do the critical analysis of what is presented. They’re thinking less because they’re too easily distracted by the …. oooh! shiny!

Continue reading “Fishy Thoughts”

The Worm Turns

EarthwormThis morning when I was doing my regular news search online, I came across two stories that stopped me cold: we’re being invaded. By worms.

Yep. Worms. Not the slimy invertebrates who write scurrilous, defamatory self-aggrandizing blogs and whine about free speech when they are taken to court over their lies, but actual earthworms. Nightcrawlers.

The little invertebrates we have in our gardens and at the end of fishhooks. They’re invading Canada. And they’re doing it rather quickly. For worms, that is. They’re actually being aided and abetted by us. Humans are the reason they’re here, and the main reason they are spreading at something slower than even a snail’s languid pace:

D. octaedra populations currently expand about 16 meters (around 52 feet) per year. At that rate, a single worm and its descendants—they reproduce asexually, so one worm reproduces on its own—could expand to cover the length of an American football field in six to seven years.

They spread thanks to hitching rides with humans, on cars, tires, shoes – and of course in fishing tackle boxes. Worm eggs and cocoons also travel as hitchhikers. Anglers who release their unused earthworms after a day’s fishing have helped the spread even more, so much so that PR campaigns are in full swing to stop anglers releasing them in the woods.

Non-native earthworms have been identified as a major threat to our forests:

…the impact of earthworms on forest vegetation was listed in 2011 as one of the top 15 emerging global conservation issues by the scholarly journal Trends in Ecology and Evolution.

The common everyday garden earthworm isn’t a native to North America. It’s a European invader, brought by settlers. Asian species have also been brought ashore more recently, and may even be destructive in your garden.

Continue reading “The Worm Turns”

Pompeii: Swords-and-Sandals Flop

PompeiiAs a film setting, the town of Pompeii in the first century CE is a lot like the deck of the Titanic in 1912: no amount of special effects or clever script writing is going to save it from the disaster awaiting. As a film, Pompeii has a lot of the former, but precious little of the latter to rescue it. That’s probably why it’s in the $7 section at the DVD store.

Let’s start with the history. Pompeii was a Roman town on the west side of Italy close to the slopes of an active volcano, Mount Vesuvius. The recipe for disaster starts with the question: why would anyone build on the slopes of an active volcano? You might ask that of the many towns and villages that currently encircle its slopes, including the city of Naples, a mere 9 km away.

Vesuvius has been active for most of recorded history. The biggest eruption took place about 1800 BCE and the last one in 1944, with many, many in-between. None of the post-Pompeii eruptions have been as violent as the one on August 20, 79 CE, however. None, however, were as great as the eruption of Thera in 1570 CE, which destroyed the Minoan civilization and radically changed the face of civilization in the Eastern Mediterranean, but I digress.

The great drama happened in 79 CE when Vesuvius exploded spectacularly, and in doing so wiped out the town of Pompeii, killing an estimated 16,000 people. Good setting then for a disaster film, right? But it wasn’t quite like in the movie – well, nothing ever is.

Continue reading “Pompeii: Swords-and-Sandals Flop”