Praise for the Beagle from a Customer

Carol & I received a letter (yes, that's right, a letter...the hand-written kind...in the mail!) from a mom. She was thanking us for our efforts with the First Lego League robotics team we fielded this year: The Crash Test Smarties. Anyway, in her letter she closed with this, "In pursuit of the truth in Science and Mathematics, you two are paving the way for a better and more enlightened future for our kids."

We sincerely hope that all of our customers feel this way. This makes all the hard work worth while.

==JFK==

Pure Silver, Anyone?

I'm mulling over the possibility of offering an intense workshop to teach DIY silver recovery, reclaimation and refining. I have a technique that I have used, and taught to others, that allows one to relatively easily recover and reclaim silver from coins, jewelry, silver plate, etc. and to refine it into a state of up to .999 purity. This three-nine purity is the same as what one gets when purchaining silver bullion whether in the form of 1,000-oz ingots or 1 oz. bars and rounds (coins). If there is enough interest I will set up dates that will work for everyone.
Please tell us at the Beagle if you're interested.

And, BTW, we will be offereing a limited supply of pure silver bars and rounds at the Beagle.

==JFK==

Updates All Over...

There are many, many things going on at the Beagle right now, and I thought that I'd take a minute here to lay out a few of them for you, faithful reader:

New look website: the H.M.S. Beagle website has been updated to make it easier to navigate and use. If you have questions, comments, or problems, let me know via email - I've got a second generation of improvements planned, but this framework had to go in place first.

Social Networking: we've expanded our presence on Facebook and Twitter. The Twitter updates also fold neatly back into both the main website and this blog (they're over there on the right). Follow us on Twitter, become a fan on Facebook, and keep up with all of the latest happenings at the Beagle. And make certain that you let us know if you became a fan, read the blog, or saw the main website after clicking through our advertisement on Facebook - it'll help us to keep track of how effective those adverts are!

Workshops, Workshops, Workshops: under the Events / Activities tab on the website, you'll find all of the things that we're doing, including the Events Calendar, with all sorts of useful information; updates on our Astronomy-related activities, including Star Parties, Telescope Basics Workshops, and Star-Hopping Workshops; additionally, we have Workshops in Chemistry, Electronics, Robotics, Rocks & Minerals, and Rocketry planned for the summer, take a look at those listings as well!

Fossil Digs: we're very, very excited about our upcoming Fossil Digs, including our First Trilobite Jam in Delta, Utah this July, and our usual Science Club fossil digs in June. Make sure that you plan to attend, and let us know via email if you have questions!

Special Events: right now, we're delighted to be planning a party on a Sunday, 11 April 2010 for Yuri's Night, and international celebration of manned spaceflight (sadly, I'll be out of town for this, but I'm hoping we'll get to swing by the one in San Francisco). The Beagle's Yuri's Night fun will include a showing of "October Skies", free rocket launches (bring your rocket!) in association with the Kansas City Rocketry Association (KCAR), and an evening of star-gazing with Leif! All of this fun is free for the whole family (weather permitting, of course); check out our Special Events Page for more information.

So that's what we've been doing, instead of writing blog entries... There's a great deal going on at the Beagle, and we hope that you'll stop in, sign up, and support us in continuing to provide great science-based activities in the Kansas City area!

MSNBC: UFOs over Cleveland?

Typical of the ignorant mis-comprehension of the mundane workings of the natural world, the mainstream media (MSNBC specifically) turn to a pseudo-scientific hack to explain something that he doesn't understand and therefore implies that it must be something "other-worldly."



And my response sent to "Contact us-MSNBC.com": "I just saw a report from MSNBC about "UFOs" over Cleveland. The "expert" you had on to talk about the lights doesn't know anything about the night sky. What you could have done was had someone on who knows something about lights in the sky. An astronomer, even an amateur astronomer, could have told you that this light is the planet Venus, which is in the western sky right now for a couple of hours after sunset. When it gets close to the horizon it appears to flicker and change colors when its light refracts as it passes through Earth's atmosphere. The next time you want to "get to the bottom" of a mystery maybe you could consult a scientist instead of a crank."

Just a hint to UFO hunters: if an object appears in the sky at the same time every night, travels across the sky at the same rate as the stars around it, and sets in the west, it just might be an astronomical object.

"Polonium Halos" in Granite

As often happens we get visitors to the Beagle that like to try out their knowledge on us "sciencey" types. A gentleman was looking at Polly in our front window this afternoon. When I told him it was a nearly complete fossil of an adult Psittacosaurus that was 125 million years old, he replied, "you don't really believe that do you?" I allowed as to the fact that I neither discovered the fossil nor dated the fossil itself, but was confident that it had been properly dated most likely based on several factors. He than said, "how do you explain the fact that granite contains polonium, since polonium has a half-life of only a few seconds?" I replied that I didn't have to explain it, but I did tell him that polonium has isotopes that range in weight from 194 to 218 and the natural isotopes have half-lives ranging from 0.145 seconds to 102 years.

After he left I did some data mining on-line and found a short article that is spot on point:

"Creationist Robert Gentry has argued that ring-shaped discoloration (halos) in primordial granite rocks are the result of damage from alpha-particle emission by radioactive isotopes of the element polonium (Po). Since radiogenic polonium has a very short half-life (usually measured in fractions of a second), Gentry argues that, if granite takes thousands to millions of years to form as mainstream geology believes, any polonium originally present would have decayed away long before the granite could have formed and could not have produced these (halos). Therefore, he feels that their existence is evidence for an instantaneous and recent creation of these granite rocks, and by extension the Earth. The following articles point out the flaws in Gentry's argument.
"Polonium Haloes (sic)" Refuted
Professional geologist Tom Bailleul takes a second look at Gentry's claimed polonium (halos), arguing that there is no good evidence they are the result of polonium decay as opposed to any other radioactive isotope, or even that they are caused by radioactivity at all. Gentry is taken to task for selective use of evidence, faulty experiment design, mistakes in geology and physics, and unscientific principles of investigation and argument style.
Evolution's Tiny Violences: The Po-Halo Mystery
Amateur scientist John Brawley investigated Gentry's claims directly by studying local rock samples, and concluded that there is no good evidence that these "polonium" (halos are actually produced by polonium at all, as opposed to longer-lived radionuclides such as radon or uranium."

This was taken from: http://www.talkorigins.org/faqs/po-halos/.

Participate in Midwest Precipitation Measurements

We are on a weekly email blast from Earth Gauge which keeps us updated on the global climate change situation. The following item arrived today and I thought many of you would find it interesting and would want to participate:

Parkville, MO
Link: http://www.earthgauge.net/2010/march-madness-2

Earth Gauge: March Madness
It’s March Madness for the Community Collaborative Rain, Hail and Snow Network (CoCoRaHS) – they want to see how many volunteers sign up this month to measure precipitation in their backyards. CoCoRahS is a nationwide network of citizen scientists who are measuring and mapping precipitation in their communities. CoCoRaHS volunteers help to provide quality rain, hail and snow data used by the National Weather Service, hydrologists, emergency managers, city utilities, engineers, ranchers and farmers, teachers and a range of other interest groups.
Viewer Tip: CoCoRaHS is in all 50 states! Sign up to become a Volunteer Observer with CoCoRaHS in your state to help this network grow. You can volunteer to measure precipitation as an individual or as part of a community or school group. Check out http://www.cocorahs.org/ to learn more.

(Sources: Community Collaborative Rain, Hail and Snow Network. www.cocorahs.org; “About Us,” http://www.cocorahs.org/Content.aspx?page=aboutus)

Let us know here at the Beagle if you do, in fact, decide to participate. Additionally, why not post you findings here and/or on our FaceBook page?

Rock Tumblers Redux: Looking at the Stages of Tumbling

Several weeks ago, I posted an entry to the blog about how to work with your new rock tumbler (this of course assuming that you had received one at some point). Six weeks into my own experimenting with rock tumbler, I'm back with a few lessons and things that I've gleaned from my own experience, which I hope will be helpful to you.

Tumbling is typically a multi-week process, depending on the materials that you choose and the kind of polish that you are hoping to achieve. The choice of materials is important, as tumbling something rather hard with things that are soft will tend to result in the soft things being smashed down into tiny bits. To be certain of the hardness of the materials with which you are working, it's essential to have either a good rock & mineral field guide (I've got about a half dozen), all of which will give you the hardness of most anything you are likely to be tumbling, as presented by the Mohs Scale of Mineral Hardness, which ranges from 1 (talc), to 10 (diamond). If you pick up a field guide and it doesn't have this basic information, put it back on the shelf and find something else. You can also use online resources to determine the hardness of your material: the most thorough of which I am aware is Mindat, which is currently a free site (although with a free registration you can have access to more features). Even with care taken in selecting which minerals and rocks you tumble, you should still expect for anywhere from a quarter to half of the volume to disappear into your slurry bucket.

Polish is also a consideration: some people will like their stones to have different lustres, so it does come down to individual taste. Personally, I want to see just how brilliantly reflective I can make some materials, so I am experimenting with a range of stone.

Assuming that you are indulging in a basic four week-long process, you will also want to choose your grits with care. Before I'd started working with a tumbler again - after a gap of many years - I had expected that four standard grits made of silicon carbide would be sufficient, and hadn't really understood the importance of the pre-polish and polish phases. I can now tell you that these are crucial (this probably should have been self-evident). The pre-polish and polish phases, both accomplished in my case with very fine aluminium oxide polishes, are essential... if you want your tumbled stone to shine, that is.

Time is also an important variable. Your tumbler should come with a guide, or you can find them on the web with relative ease (also in my last post). On my first attempt through the whole of the process, I allowed at least a week for each tumbling stage. This may have been overkill, but on the other hand, I was recently told of a man who left his rough in the final polish phase for something on the order of six weeks! This is probably unnecessary, at least at first. Follow the guides to begin with, until you will get a sense of which materials will require longer than others in the various stages. Again, this often comes down to personal taste.

One thing that is somewhat annoying is that, for the cleaning phase, the use of Ivory Snow flake detergent is often recommened, at least in North American guides. Unfortunately, this product no longer exists. However, if you can't find another plain, pure, unscented soap, the workaround is simple: find a bar of Ivory Snow soap (which does still exist), or any other basic unscented Castille-type soap (Pure & Natural also comes to mind), and use an old cheese grater to make your own flakes. It may help to dry the soap out a bit first - put it in a warm, dry place for a few days, then grate. You will now have soap ideal for use the cleaning phase of tumbling.

Rock tumbling seems, in the shiny new digital 21st century, like something of an anachronistic pursuit, and perhaps it is. But it is also one which connects us with the realities of making something, of doing something, rather than simply paddling around in the virtual pool. Hopefully, you will take as much enjoyment from it as I am.