Lichens

Lichens are the main food source for a variety of animal species from small mites and insects to the remarkably large reindeer. They tend to be protein-poor but may be rich in carbohydrates.

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Image 130 – What’s in an image? Sometimes quite a lot, more than meets the eye. I’m posting an image every day or so.

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Lichens are amazing. They’re always small, they grow in slowly expanding colonies, and they consist of cooperating fungi and algae. A number of different species of fungi can grow like this, combined with various yeasts and bacteria. The assemblage often looks like a simple plant, often almost flat, but sometimes filamentous, branching or in the form of flakes. Circular forms like the one in the image are common. The Wikipedia article listed below has photos of a range of different forms.

The grey colony in the photo has grown out from the centre ‘cleaning’ other life forms from the surface of the underlying limestone and spreading out further around the perimeter. The black lichen was destroyed as the grey lichen crossed over it, but new colonies of the black lichen have established on the clean rock left behind. The situation is dynamic, but very slow. Return for another photo a month later and little will have changed.

Lichens are the main food source for a variety of animal species from small mites and insects to the remarkably large reindeer. They tend to be protein-poor but may be rich in carbohydrates.

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Science and technology – 1

Getting enough sleep is important of course, but the quality of our sleeping matters too. Good exercise, diet and quiet, undisturbed surroundings are helpful factors.

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Welcome to a new feature on JHM, a series of articles on science and technology. I’ve posted articles like this before, but not as a regular series. From now on science and technology articles will be easier to find and browse with their own index.

This time, we look at the topic of sleep.

Sleeping well

Why sleep matters

Sleeping well is clearly important. We all know that lack of sleep makes us tired, perhaps a bit grumpy, and affects our ability to focus. We’re more inclined to doze off, and microsleeps lasting a second or so can be absolutely deadly (quite literally) for someone trying to drive or use heavy machinery.

But there are longer term health effects too (see the Nature article listed below).

Improving your sleep

The New Scientist articles cover many aspects of sleep. Getting enough sleep is important of course, but the quality of our sleeping matters too. Good exercise, diet and quiet, undisturbed surroundings are helpful factors. It’s useful to consider how our time awake will affect our sleep. There are hormonal effects affecting both falling asleep and waking up – melatonin and cortisol – so we need to consider those as well.

In terms of practical advice, useful tips include – using bright lighting in the morning (especially in wintertime), and dim lighting in the evenings – keeping the bedroom cool and dark – avoid eating and drinking late in the evening and be wary of late caffeine intake – avoid stress near bedtime if possible.

Surprisingly, perhaps, your gut microbiome is another factor, and it works both ways. Sleep patterns can affect the microbiome, but a healthy microbiome helps provide better sleep.

Going deeper

The links below provide further reading. The New Scientist link will give you an overview with introductions to all the articles, though if you want the full text you’ll need a subscription or access to the printed version Many libraries will have a copy.

The other two links are free for the full text.

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Military or civilian targets?

The end may come during 2025 or 2026, but it might also happen very much sooner. It’s likely to be a surprise and it will almost certainly end the war, with Ukraine being the survivor.

Forward look, Ukraine – 3

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It’s time for another look at the war, to see where things stand in January 2025 and where they may go next. Donald Trump has now taken office as President of the USA and the only thing we can be sure about is that his policies for America’s actions will be different from those of his predecessor, Joe Biden.

Meanwhile, in Russia, there are economic, political and military considerations in play and all of them seem problematic for Vladimir Putin (to say the least).

Ukraine continues to take a battering but resistance remains stubborn and determined. For both the population and the armed forces a combination of tiredness, resolve and good morale are all clearly detectable. They are a long way from giving up and a long way from being defeated.

The fighting

Russia and Ukraine have very different approaches to events on the frontline. Putin has demanded a heavy-handed approach, losing an enormous number of troops and huge quantities of equipment, currently throwing wave after wave of infantry at well defended Ukrainian positions (and now some North Korean infantry as well). Russian forces have been ignoring the rules of war, sometimes shooting prisoners, using chemical weapons and so forth.

Ukraine has lost men and equipment too, but on a far smaller scale. Their stubborn resistance along 1200 km of front line has prevented Russian forces from breaking through and although the forward momentum has been in favour of Russian forces it has also been momentum of a very slow, creeping kind. Ukraine has acted entirely within Geneva Convention rules.

On the missile and drone warfare there is a similar difference in approach between the two sides. Russia has targeted residential areas of towns and cities, even hospitals, schools, shopping centres and cultural treasures along with critical infrastructure, especially electricity power stations and local distribution transformers. Again, most of these targets are illegal under international laws and agreements, Russia being a signatory to many of them.

Ukraine has focused on military targets – command and control centres, airfields, naval dockyards and ships, army training camps, troop concentrations, oil production and storage facilities, arms factories, ammunition storage facilities, radar equipment, bridges, railways and roads feeding military traffic to the frontlines.

The effects so far

There have been small, creeping movements along the frontline, mostly in Russia’s favour, although the trend has been slower and slower over the past month and now Ukraine is beginning to make small advances as well from time to time, usually by means of well-planned and well-executed actions when good opportunities arise.

Economic considerations

The Russian economy is showing serious and dangerous strain. The rouble has lost a lot of value against western currencies. Interest rates are high as the central bank has used this as an effective tool to restrict inflation; but the increased borrowing costs have killed industrial investment. Unemployment is very low and Putin has claimed that as a great success, though the reason for it is that military casualties are in excess of 800 000 men and even larger numbers have fled the country to avoid being sent to the frontlines. Most industries are seriously short-staffed; skilled professionals are particularly hard to find.

By defeating Russia in the Black Sea, Ukraine has been able to continue her grain exports whereas Russia’s income from sales of oil and natural gas have fallen due to western sanctions as well as Ukrainian strikes on depots, production and transport facilities.

Military production

Russia is still producing new drones, missiles, ammunition, aircraft, tanks and other armoured vehicles, but at a slower rate than the losses inflicted by Ukraine. Stocks of all these essential items have therefore dwindled away and now appear to be in short supply.

Ukraine has also ramped up production of military hardware and consumables and is now in a position to continue fighting even if supplies from the West diminish.

Innovation

Russia has made progress with drone development, and has recently been making more use of FPV drones controlled via optic cable since this cannot be blocked by radio jamming.

However, Ukrainian production and scale of use of advanced drones far outstrips Russian developments. Recently, Ukrainian sea drones have been fitted with both machine guns and ground to air missiles and have downed helicopters sent to destroy them. This is a major new technological achievement.

And the future?

The balance has been shifting in Ukraine’s favour in so many ways, and the best predictions suggest the Russian economy will collapse, most likely slowly, then suddenly. It’s impossible to know precisely when ‘suddenly’ will come, but it will be devastating when it does. And economic collapse will likely mean military defeat and political upheavals as well.

My opinion based on what I have read and heard, is that the end may come during 2025 or 2026, but it might also happen very much sooner. It’s likely to be a surprise and it will almost certainly end the war, with Ukraine being the survivor.

Militarily too, Ukraine seems to be getting the upper hand. I think it’s very likely that things will go more and more Ukraine’s way in this war in the next few months. There are many unknowns of course, but on balance I expect Russia to eventually lose the war, probably through a combination of economic and military failure, and quite possibly by a Russian decision to withdraw from the conflict altogether. This could happen either as a decision from Putin following pressure internally or by a change of government. These details are not remotely predictable, however.

We in the West should do our part by continuing to apply political and economic pressure, and by continuing and extending our support for Ukraine.

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Really?

Professor J P Hudson offered a prize to anyone who could submit a paper for publication without … a spelling mistake, or a punctuation error, or an unclear phrase. And I don’t think he ever had to pay out the prize.

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Image 129 – What’s in an image? Sometimes quite a lot, more than meets the eye. I’m posting an image every day or so.

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I was amused when I saw this in a local shop window a couple of years ago. Sometimes we’re not quite as good with words as we should be, and right at the start I admit that I’m just as bad as anyone else. But this one did give me a chuckle. It just begs the question,

‘So.. er… What would unconscious eating be, exactly?’

Just my silly sense of fun!

I think what happens, ever so easily, is that I word something in a way that’s not clear and then cannot, myself, spot the issue. It needs a fresh eye, a fresh mind to spot mistakes like this.

When I worked at Long Ashton Research Station in the 1970s, the Director, Professor J P Hudson, offered a prize to anyone who could submit a paper for publication without him spotting a spelling mistake, or a punctuation error, or an unclear phrase. And I don’t think he ever had to pay out the prize (£5 I think, quite a lot in those days).

Sometimes we need to see what we have written from a new perspective in order to fix or avoid simple mistakes. And sometimes we need the same fresh look at our habits, likes and dislikes, relationships with others, understanding of science, what we believe about the world, the people we meet, and not least, what we believe to be true about spiritual things.

It’s far too easy to go along familiar pathways in our lives without seeing the need to question what we think and say and do.

When: 25th September 2023
Where: Cirencester

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A quarter of a million miles

The horizon is, perhaps, 2 km away, you can see buildings and trees out there, they give a good clue to scale. Some of the clouds might be a bit further away.

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Image 128 – What’s in an image? Sometimes quite a lot, more than meets the eye. I’m posting an image every day or so.

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This is a view of the local neighbourhood, you can only see a short distance – little more than 380 000 km or about 250 000 miles.

Uh?!

Can you see why I wrote about seeing 380 000 km? Is there something you missed in the photo? Look more closely…

The horizon is, perhaps, 2 km away, you can see buildings and trees out there, they give a good clue to scale. Some of the clouds might be a bit further away. But that little white dot near the centre of the photo is the Moon, the furthest thing you can see in this picture.

The scale of our universe is nothing short of astonishing! The Moon is just our nearest neighbour in terms of the Solar System. All of the other planets are much, much further away than our friendly little Moon. Then consider that the entire Solar System is just a little speck in terms of our galaxy, The Milky Way. And if you travelled the Milky Way from end to end you’d still have seen only a very, very, very insignificant fraction of everything else that’s out there. My goodness this is a big place!

If you want to get a feel for this, try Scale of the Universe. It starts with things of everyday size and you can slide left (smaller) or right (larger).

When: 10th September 2025
Where: Cirencester

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If you enjoyed this or found it useful, please like, comment, and share below. (If you don’t see those links, click the article’s title above the main photo and they will appear.) Send a link to friends who might enjoy the article or benefit from it – Thanks! My material is free to reuse (see conditions), but a coffee is always welcome and encourages me to write more often!