Ever have trouble remembering a word when you know the meaning? The reverse dictionary seems to be a great way to track it down. (Found via The Daily Dish).
Author: Lensyl Urbano
Rearranging the map
What if you exchanged countries based on population for land area? So China, which is the most populous country would take the place of Russia, which has the largest area. It would create the intriguing map below (from the wonderful blog, Strange Maps).
Exploring Space: Extrasolar planets
One of the neatest developments in recent space exploration has been the accelerating discovery of planets orbiting other stars. Other stars are just so far away that it’s insanely difficult to see anything orbiting them. Also, the stars can be much brighter, a billion times even, than the planets. So, in the beginning, they could just identify the largest of planets, Jupiter sized and bigger, because of they way they make their stars wobble, but this and other techniques have gotten better and better and now we’re looking at smaller and smaller planets, getting down to Earth sized objects.
One of my students, in investigating modern space exploration, found The Extrasolar Planets Encyclopaedia, which is pretty sweet because it keeps a running tally of planets found outside our solar system. When he found it last week the number was 502, now it’s 504. The site also has a long list of the ground and space based projects looking for extrasolar planets, which demonstrates how active the field is today.
Letter from a dying explorer
While discussing polar exploration, I mentioned the story of Amundsen and Scott’s race for the south pole. The fascinating blog, Letters of Note, has Scott’s last letter, written bit by bit, on the ice, to his wife back home. It starts, “To: my widow.”
P.S. Letters of Note is a great resource for examples of great letter writing.
Ice dogs in polar exploration
One of my students is working on a personal project on ice dogs and how they aid polar exploration today and in the past. Amazingly, dogs are still used in expeditions that spend the winter on the ice, as shown in the video from the Tara expedition of 2006 (hat tip to Ryan):
God, Glory and GOLD: but why gold?
NPR’s Planet Money has a nice story on why gold is used for money. They take the entire periodic table of elements and eliminate the ones that don’t work because they’re too reactive, a gas, too common, or too toxic. You’re left with five precious metals, rhodium, palladium, silver, platinum and gold, but only one of them has a low enough melting temperature so that it can be worked easily and is not ridiculously rare.
Also, Tony Clayton has a wonderful webpage on Metals Used in Coins and Medals. It has some fascinating details about the history of these metals and their alloys in coinage. For example, “In Old English the Latin word aes was rendered as brass, thus the use of the word brass to mean money still found today, especially in Northern England. “
Pumpkin Chuckin
Mr. B’s put me on to the World Championship Punkin Chunkin Association, which has an annual competition. There’s a Discovery Channel program about it too.
Although my head-of-school is not partial to us throwing food around, a trebuchet would make a great project for physical sciences next year (Year B).
Microwave Science
Last year, for an IRP, one of my students did the experiment measuring the speed of light (and the wavelength of the waves) using marshmellows in a microwave. The video above (via Gizmodo) shows the pattern of the microwaves using some neon lights embedded in plastic. The video below, from MythBusters, shows superheated water in action; something I demo every time I make tea-water in the microwave.