Being conscious of our hygiene is a good thing, of course. But is it possible to overdo our hygiene routines for our own good? Have you noticed how more and more people use sanitizing hand wipes, or antibacterial hand soaps? Their function, of course, is to ‘wipe out’ all the bacteria around you—but is that always a good thing?

I’ve always had my theories, but now there’s actual evidence—it’s probably not a very good thing on the long run.

For one, not all micro-organisms that we’re exposed to (or that live on or inside us) are harmful for our health. Some are actually our friends! It’d suck to have them die out, right? Well, guess what the antimicrobial lotions that you use do.

For another, our bodies have their own incredible immune system, which is trusted with protecting the body against disease, and killing germs and tumors that affect us. Well, part of how the human immune system works is that it’s adaptive, which means, our body actually learns from experience whether a certain organism is harmful or not, and whether something in our body needs to be attacked or not. This is an incredible mechanism, but this, by definition, is dependent upon the body being exposed to some amount of microbes, so that it can keep itself healthy and at a cutting edge.

In fact, this is exactly the function of vaccines: expose the body to a small amount of impotent germs, so that the body can trigger its immune system and form a ‘memory’ of that particular disease. Next time an actual disease tries to attack—BAM!—the immune system is there to take care of it at the outset.

(As an aside, yes—all those people going on an on about getting rid of vaccines? They don’t know what they’re talking about. Some people are not in a position to make an informed choice on their own, and those that are, sometimes make their decisions based on something other than logic, science and information. For example, this (a video on the page starts autoplaying; please mute your speakers if that’s a problem).)

Given this mechanism, what do you think happens when you wipe out every kind of microbe on or around us, with those antimicrobial wipes of yours? The body loses all ability to adapt and keep its immune system updated and at peak working condition. This is fine as long as you allow nothing infectious to approach us—but the moment something does sneak through, the body has no mechanism to counter it. The effect—being sick at the first sign of disease. This, of course, is not such a great thing.

Most people are familiar with this effect—this is why we’re wary about drinking tap water when we visit a new place. Even though residents there are perfectly healthy—which means the water is nominally clean—we might get an upset stomach upon drinking the local water: our bodies were not ready for the local microbial action!

This effect is multiplied many times when we’re chronically using wipes to “sanitize” ourselves. Sanitize ourselves we do, but we also take the edge out of our immune systems.

Being hygienic is good, yes. But it’s also good to play in the mud sometimes, and to expose ourselves to our fellow invisible Earthlings. And it’s mostly fine—and in fact healthier—to wash ourselves with just good old soap!

I had not heard of the Abydos carvings before. But then we went to Egypt, and it turned out that my Dad had requested that Abydos be put on the schedule—even though it wasn’t a ‘usual’ tourist destination. (I still don’t know whether he’d come across these specific carvings as a reason to go there. Baba, will you leave a comment if you read this? :))

But the carvings were quite amazing. There they were—a few of them adjacent to each other, each apparently depicting something we’d recognize as a modern (or future) means of air travel. (I have my own photos, but it’s easier to link to photos online.)

Was this really evidence that the Egyptians knew how to fly—or at the least, had witnessed flying machines?

My immediate thought was an emphatic NO. Not simply because it sounds implausible, and not because I don’t believe in aliens. Even if it is possible, I had my own reasons: amongst other qualities, the Egyptians certainly had one—they were record-keepers. They kept extremely intricate records of everything they knew about—and repeated this knowledge everywhere they could: every temple, every column, every tomb.

Is it really possible that they witnessed something so—forgive my pun—out of this world, and only made ONE reference to it? One set of carvings, in one temple, located in a far corner, high above the ground, where it is easily missed? Now that is implausible.

Of course I looked online when I was back—and initially, this is the best explanation that I found. Apparently a set of carvings were recarved, i.e. more carvings were done on top of the original—each modification at different times, even—with the end result being what we see today. I did not like this explanation at all. The webpage has some detailed drawings, but—I didn’t like it. How many separate coincidences must there have been—over many centuries of recarvings, done intentionally by different sets of people—that such an intriguing piece would result? Again, implausible.

Now I’ve found a better explanation. And this involves more chance and less human intervention. Apparently there are other carvings found at the same temple, which have nothing at all to do with avionics, that can explain our mystery. It can be something as simple as an incomplete carving, coupled with damage over the millennia!

Seen side by side, this image and this one seem to indicate quite convincingly that our mystery panel was meant to be similar to the other, more conventional, carving.

Granted, it’s still quite a coincidence—alien theorists, you need not retire yet on this one—but it still seems an acceptable coincidence!

Are you convinced, or are you looking up at the sky, trying to look past those cloaking devices?

P.S.: It’s so easy to find anything alien related on the internet! The cloaking device thing was intended as a joke, stemming in large part from my teenage—and, ahem, later—Animorphs days. I did a Google search looking for interesting links, and voila!

Steve Jobs passed away today. 😔

I’ve only seen him as a public figure, of course, but I was, and will remain, a fan. I’ve admired him greatly, not just for the company he built, but for how he conducted his business—well, for the things he said and did publicly, at any rate.

A straightforward, honest man who played extremely hard when running his company, but who made sure he did the right thing all the same.

For an inkling to his way of thinking, see his Stanford commencement speech, and the interview he gave at the D8 conference.

Rest in Peace, Sir. Your legacy will live on, and will hopefully inspire the next generation of visionaries.

–

Cross-posted at GLobeTrekker

Boeing is in the process of launching (finally, after delays) its latest aircraft, the Boeing 787 Dreamliner. This is the first new major jet launched since the Airbus A380, and of course, has me interested in many ways.

Of course, on a personal-professional level (if that term makes any sense, which I have a feeling it doesn’t—anyway, I work with composite materials, remember?) the B787 is mostly made out of composites. Mostly out of carbon-fiber laminates; some out of carbon fiber sandwiches—use of metal (titanium and aluminum) is minimal.

Second, I just love the wing design. The sweep and curve upward of the wings is just beautiful. Also, it is a vast improvement over the last generation of wing-tips, which looked as if from a design perspective they were a later ‘add-on’ to a previous, flat shape. Here, finally, is a smooth, elegant, downright beautiful wing shape!

I also found this link to the B787’s design highlights. It’s an informative page, do check it out. (For information about the composites being used, go to Visionary Design→Composites.)

From the link above, I learn (among other things):

• There is a very futuristic HUD (Head-Up Display) in front of the pilots which combines what the pilot actually sees with other useful information that the pilot needs. I’ve seen things like these in Fighter Aircraft simulations, but is this the first time it’s being used commercially?
• The B787 is not a very large aircraft! I had inherently assumed that the plane would be B747 or A380 scale (i.e. a pretty big plane), but it’s not—it can carry a maximum of about 300 passengers, compared to the B747’s ~400 and the A380’s 525 in three classes.
• The internal air pressure of the aircraft will correspond to a lower altitude (6000ft, as compared to 8000ft in earlier aircraft), and will have higher moisture content—meaning a more comfortable flight!

Now, what remains is for the major airlines to buy these and put them into service.

So, I’ve defended my Ph.D. Preliminary Exam (phew), and what lies ahead are the defense of my thesis proposal, and the final Ph.D. Dissertation Defense, of course.

Does this mean I can now call myself a ‘Ph.D. Candidate’, as opposed to a Ph.D. student? Is there a difference in connotation? I’m not really sure about the protocols involved.

If you happen to know the norms (or lack of them), leave a comment, will you?