Robert Krampf teaches us how to make butter, explaining the science of butter-making. I certainly learned some things along the way. In the following video, he talks about infrared, a color that our eyes can't see. I learned of these videos, and much more in this list of 100 science videos for science teachers.
If you like fun science videos, here's ten of them for you.
I founded Dangerous Intersection back in March, 2006. That was 4,500 posts and 21,000 comments ago. Now that we've reached the end of another year, I decided to check DI's traffic. We're not a huge site but we're not small either. I thought readers might find it interesting to see the same stats that I periodically check. Here they are (this is a clickable image):
As you can see, we receive almost 6,000 daily visitors these days, which is gratifying and a great honor to each of us who write at this site. [Note: We changed servers in mid-August, so you will not see the full year's stats in this image].
Thanks to all of you have visited DI or commented at DI over the past year. Our plan is to keep improving and keep growing. For those who have not commented before, please do consider leaving a comment, especially if you disagree with us.
And happy new year to everyone.
It is the first Sunday of 2011. I woke feeling a bit uneasy; somewhat queasy. As though someone were calling to me, deep inside. As a good igtheist, I ignore calls from the invisible beyond, even on Sunday. But as the day progressed, I divined that it was Lord Ralph calling to me. Loud. After another hour, it became distressing. I tried to placate him with a wintergreen pink tablet made with compounds of Bismuth (the element between toxic lead and radioactive Polonium). But he continued calling louder. I huddled under my blankets and moaned. This helps for a short periods, repeated over a couple of hours. Finally his call became not just clear, but imminent. Lord Ralph was demanding immediate supplication. I threw a wrap around my shivering shoulders and bolted for the room of his shrine. As I knelt before his porcelain altar, I gazed up through at shimmering ceiling to see if his ethereal chariot was nigh. It was. Forcefully I hailed the Holy Buick. The stars then did shimmer around me. The chariot was passing. I hailed it again, slightly weaker. It receded, even though I did loyally call after it a few more times in breathlessly quick succession. Lord Ralph must have been pleased. He set peace upon my wracked body, and allowed me go return to my covers and lie in serenity for a while. Then my wife came to offer us a bile-colored, caffeinated, fizzy, syrup solution over ice, called Mountain something-or-other. This, sipped with great respect, did placate this irresistible lord.
What follows below is an audio version (with slides) of a presentation given at the Yale Medical School by science writer Carl Zimmer. His lecture starts with the discovery of the first recognized Neanderthal bones, and brings us up to modern times. The general theme of the talk is that those beings who have been recognized to be different have traditionally been characterized as barbaric and inferior. This theme holds true regarding Neanderthals, who have been traditionally characterized as brutish and uncivilized. Zimmer's talk includes numerous vivid reconstructed images, and the evidence on which they are based, suggesting that Neanderthals looked and acted quite human, indeed. The emerging truth is that Neanderthals were big-brained hominids who lived across great expanses of Europe from 200,000 to 20,000 years ago. They were prolific tool-users: For example, they made stone tools such as spear tips and bows and arrows; they cleaned hides and fashioned clothing. they lived in communities where they would have specialized areas for storing and preparing food. It appears that they left flowers at their burials sites. They made jewelry out of painted shells, suggesting that they were self aware.
The Red Headed Neanderthal from Carl Zimmer on Vimeo.
Starting at the 20 minute mark, Zimmer discusses the work of Svante Paabo of the Max Plank institute, which recently completed its analysis of DNA found in the bones of Neanderthals. Neanderthal skeletons that appeared to be hybrids provoked researchers to obtain an entire Neanderthal genome. Researchers then found that the Neanderthals have the same FoxP2 gene that we do, suggesting that they might have had language. The elephant in the room is that Neanderthals are no longer here and we are. But they are still living on in one sense, as Zimmer explains at the 41 minute mark. The Planke institute determined that between 1-4% of non-African DNA is Neanderthal. How's that for humanizing Neanderthals?