November 16, 2018
When we try to classify the myriad forms of life on earth, the most fundamental breakdowns are at the Kingdom level: we have the Kingdoms of Animals, of Plants, of Bacteria, of Fungi. All life as we knew it fit into one of the Kingdoms and could be classified and linked as such.
Except, that is, for the few hemimastigotes that were then known.
In a lucky find, as reported by CBC, Canadian researchers identified two more species of these rare creatures. More importantly, perhaps, they captured the genomic information. From that analysis, they are happy to announce that hemimastigotes are so different from all other life that they form a brand new fifth Kingdom all of their own..
It is so rare an event that the Tree of Life is reorganized so radically, that we need at least to report it.
November 13, 2018
What is it that we don’t already know about whales? They have been the planet’s favourite cause for many years now. Well, it seems that they don’t need very much sleep; and the sleep they do get may only be in half their brain at any one time. So suggests some research from 2008.
Sperm whales literally drift to sleep, but it’s a snooze like no other, according to a recent study that found whales perform slow, rhythmic dives as they slumber. Because these drift dives keep the whales in constant motion as they rest, scientists now think the seafaring mammals sleep with one side of their brain at a time. The two sides alternate until both are rested …
The scientists observed two types of drift dives. The first, head-up drift dives, happen when a whale’s rear end slowly sinks into the water from a horizontal posture. During the second type, head-down, the whale descends slowly with its head directed toward the ocean floor. It travels downward about one or two body lengths in depth before flipping back upward toward the water’s surface. The researchers think the whale’s internal buoyancy causes this natural upward motion, similar to how a sinking apple eventually bobs back to the surface …
“Their bodies have found a way to cope, offering evidence that sleep isn’t necessary for development, and raising the question of whether humans and other mammals have untapped physiological potential for coping without sleep,” said Jerome Siegel, director of the Center for Sleep Research at the University of California at Los Angeles.
Interesting research. There was more detail in the original story from Discover News, but the link now fails,
October 4, 2017
I was just a few weeks away from my 8th birthday when my father sat me on his knee specifically to listen to our old radio spit out some strange sounds — “Beep. Beep. Beep.” Even through the static we knew we had never heard the like of it before.
On October 4th, 1957 — just sixty years ago — the space age began with the launch by the Soviet Union of Sputnik, the first man-made satellite. I’m sure the surprise in the US was far greater than we felt in Europe. We Europeans were already terrified of the power of the grey beasts just a few hundred miles to the east of our cozy nest in West London. It seemed to many that Russian tanks could overrun Europe at any moment, and the technological genius of Sputnik simply confirmed our anxiety.
But again, there was always that secret spot inside that reveled in the fact that a European power had beaten the Americans into space. And for my socialist grandfather and his cadre of friends, it was yet another sign that the Workers’ Paradise was superior in every respect to the Mickey Mouse- and Doris Day-loving capitalists.
In the end, I’m sure this had little to do with the ultimate end of the Cold War. The costs of the space race were minuscule compared to the economy-shuddering trillions spent on the arms race by both sides. But without Sputnik and all that followed, we would be a very different and more distanced world today.
June 29, 2016
One of the delights of each week for me is to listen to the Quirks & Quarks podcast on CBC Radio. I always learn something and this week was no different.
I learned that there is something called aphantasia, which is an inability to produce mental images. Those with this condition have no mind’s eye and do not “see” things in their mind as most of us do. For example, if someone is talking to me about Paris, then an image of the Eiffel Tower may well pop up in my head. But for those with aphantasia this doesn’t happen.
Oddly, this doesn’t seem to affect imagination directly because one sufferer is the author Michele Sagara, well-known for her narrative depictions of fantasy worlds. Another is Blake Ross, founder of Firefox.
This is a recently discovered disorder because those who have it assumed everyone thought the way they do, and those without it had no idea that mental images could be done away with. The discovery was essentially accidental.
The podcast is worth listening to. It begins at 1:31.
March 20, 2015
We live in an extraordinary age, when we can get a man-made craft as close as a few miles to a comet crashing through the immensities of space. I am reminded of this as I look through the sequence of images published in the New York Times today. My favourite is this one:
February 12, 2015
Regular readers of this blog might well think that I obsess over the naps that I take. However, the evidence for the benefits of naps keeps growing.
Yet another group of scientists is reporting that naps “can help relieve stress and bolster the immune system,” for those who don’t sleep well at night.
Researchers analyzed the participants’ urine and saliva to determine how restricted sleep and napping altered hormone levels. After a night of limited sleep, the men had a 2.5-fold increase in levels of norepinephrine, a hormone and neurotransmitter involved in the body’s fight-or-flight response to stress. Norepinephrine increases the body’s heart rate, blood pressure and blood sugar. Researchers found no change in norepinephrine levels when the men had napped following a night of limited sleep.
Lack of sleep also affected the levels of interleukin-6, a protein with antiviral properties, found in the subjects’ saliva. The levels dropped after a night of restricted sleep, but remained normal when the subjects were allowed to nap. The changes suggest naps can be beneficial for the immune system.
As you know, I am a sucker for naps and take them whenever I can, so I don’t need this kind of reinforcement. But I would strongly suggest that those negotiating labour agreements might want to use this evidence for instituting regular nap times at work. It is a health and welfare issue after all.
December 30, 2014
A few weeks ago I wrote a piece about how much of “our” body was actually composed of bacteria and similar organisms. Now, it seems, some of those brethren of ours may actually control how long we live, and how (un)comfortable our old age is. The reporting is from sciencedaily.com:
Using mathematical modeling, researchers at New York and Vanderbilt universities have shown that commensal bacteria that cause problems later in life most likely played a key role in stabilizing early human populations [which]… offers an explanation as to why humans co-evolved with microbes that can cause or contribute to cancer, inflammation, and degenerative diseases of aging.
The work sprung from a fundamental question in biology about senescence, or aging past the point of reproduction. “Nature has a central problem–it must have a way to remove old individuals, whether fish or trees or people,” says Martin Blaser, microbiologist at New York University Langone Medical Center in New York City. “Resources are always limited. And young guys are ultimately competing with older ones.” In most species, individuals die shortly after the reproductive phase. But humans are weird–we have an extra long senescence phase.
Blaser began to think about the problem from the symbiotic microbe’s point of view and he came up with a hypothesis: “The great symbionts keep us alive when we are young, then after reproductive age, they start to kill us.” They are part of the biological clock of aging.
Sheesh! What do we get out of all this? Do you ever get the feeling it is these microbes that are running the whole scheme, and not us?