October 22, 2012 - Start of Free Speech Week

You could start thinking about freedom of speech by checking out the official Free Speech Week website. There you can find out about an essay contest (which ends today!), watch some videos, and find out what various organizations have done to celebrate freedom of speech.

The creators of the day encourage us all—kids and teens and adults—to write in private journals or public blogs, to comment on Facebook or on others' blog posts or websites, to write articles or letters for school or city newspapers—in order to to exercise our free speech rights and express our ideas.

I just read an interesting blog post from PZ Myers. He wrote that “free speech is not freedom from responsibility,” and he explored some of the nuances of the free speech discussion. Basically, he points out that this freedom, like any other freedom, is not absolute.

I have always known that free speech has some limits. For example, it has been ruled that free speech doesn't include speech that causes others clear and present danger, such as screaming “Fire!” in a movie theater when there is no fire. You probably know that libel and slander and defamation laws also limit free speech: you cannot write or broadcast a false claim that gives someone else a negative image. There is even some limitation of public disclosure of private facts—even if the facts are true, courts have ruled, that is no defense against invasion of privacy.

So there are a lot of reasonable limitations on freedom of speech. 

PZ Myers points out that some people complain that someone's freedom of speech has been violated if they are not allowed to comment on a certain website, blog with a certain blog group, or talk on a certain broadcast show. But, he says, that is clearly wrong. The person can still speak freely elsewhere. There is no reason that a website moderator, say, or network executive HAS TO provide a soapbox and megaphone for every single person in the world to say whatever he or she wants, whenever she or he wants.

People who disagree with you and me—even people who have awful views and ideas—have the right to speak and write about their ideas. But they don't have the automatic right to speak at, say, the science conference I went to a few months ago, or the church down the road, or a soldier's funeral. I have a right—–and even a responsibility!—to eliminate a comment on my Facebook page or on this blog if I consider it highly inappropriate or hate speech.

Myers points out that when we discuss freedom of speech, we should acknowledge the problem of privilege. As always in a democracy, where the rights of the minority must be safeguarded against the whims of the majority, we must consider the fact that not everyone has equal access to public speech. It seems as if the internet offers a democratic solution to the problem of the wealthy and powerful owning the printing presses and broadcast stations. However, even on the internet, we have to watch out that the loudest and most aggressive voices don't drown out everyone else. One possible problem with communication on the internet is its opportunities for anonymity; I have seen, over the years, that people writing anonymous posts or comments often feel free to speak horribly hateful words that they would never, ever say to someone in the flesh, in real life.

Basically, freedom of speech is important, and worth defending. But this freedom must be discussed with nuance rather than with absolutes. It is a freedom that must be balanced against other freedoms. It is a freedom that carries responsibilities to ourselves and others.

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October 21, 2012 - G4G Day

Today is known as “Gathering for Gardner Day” and “Celebration of Mind Day.” It is a celebration of puzzles, math, Lewis Carroll, skepticism and rationality.

Most of all, it is a celebration of the life and work of Martin Gardner.

Martin Gardner, born on this date in 1914, “teased” brains with math puzzles in Scientific American magazine for decades, and he also wrote more than 70 books. Many of his books were compendiums of puzzles, but not all; he wrote Science: Good, Bad, and Bogus, Martin Gardner's Table Magic, The Whys of a Philosophical Scrivener, The Annotated Alice,* and many other non-puzzle books. 

* By the way, if you're wondering why a mathematical puzzles creator wrote a book about Alice in Wonderland (and, it turns out, became a bit of an expert on Alice's author Lewis Carroll), remember that Lewis Carroll was a pen name for Charles Dodgson, a mathematician and math teacher at Christ Church College, part of Oxford University.

Celebrate!

Have some fun with Martin Gardner (and Martin Gardner-esque) puzzles on Puzzle Playground.





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October 20, 2012 - Bridge Day

Have you ever wondered how people build bridges? How do you start? Do you build from the bottom up, or from the top down? How do you start to reach from side to side over treacherous waters or a deep chasm?


The Niagara Falls Suspension Bridge is an early example of a bridge that allowed pedestrians, carriages, and trains to cross a wide river—as a matter of fact, it is the world's first working railway suspension bridge. And that first step—the laying of the first line across the wide and turbulent Niagara River—was accomplished by flying a kite!

The builders were stumped because the water was so turbulent that the rapids were called Whirlpool Gorge. They didn't think a boat could take the first wire across the river to start the bridge. Someone suggested shooting a rocket attached to a wire, or some sort of bombshell with a wire, shot out of a cannon. But one many suggested offering a cash prize to the first child who could fly a kite over the gorge.

A 15-year-old boy named Homan Walsh won the prize (either $5 or $10—accounts vary) by flying a kite from the Canadian side of the gorge. Eventually, when the winds subsided, his kite descended and got caught in a tree on the American side. The day after this contest-winning flight, a stronger line was attached to the kite string; a rope followed, and then a cable made of wire.

Next, the builders created a temporary suspension bridge across the Niagara River. They used that temporary bridge to build a better, stronger, permanent bridge.

I've always wondered how bridge builders create those supportive towers in water. I found out that, in the olden days (such as the days of the Roman Empire), huge boulders were piled up in the water, and the bridge was built on and secured to the boulder piles. Later, builders would lower a caisson, which is a huge cylinder made of steel and concrete, into the water and onto the river-, lake-, or seabed. The water was then pumped out of the caisson. At this point, the caisson became a sort of circular dam that kept water away from workers and equipment. Since the 1930s, bridge builders generally float enormous metal caissons to the designated spot and then sink the caissons by gradually filling them with concrete and water. Divers are on hand to make sure that the sinking caissons settle on the right bit of ground.

To learn more about building bridges, check out the Worsley School Building Bridges page. Also, check out the Official Bridge Day website.

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Baseball great Mickey Mantle's birthday 


October 19, 2012 - Teen Read Week

and It Came from the Library!


One line on the Young Adult Library Services Association's website is “Dare to Read...For the Fun of It.”  Of course, these letters are red and drippy, and other letters on the page are green and gooey—YALSA really seems to want to appeal to teens gearing up for Halloween.

Indeed, a creepy book can be even more scary than a horror movie or haunted house. When something appeals to our imaginations, gets into our heads, it can be really, truly frightening!

Do you like to read scary books and stories? I REALLY don't like horror, but I do love a good murder mystery. My favorite mystery author is Agatha Christie (her books are best for teens and adults), and some mysteries meant for younger kids include Zilpha Keatley Snyder's The Egypt Game  and E.L. Konigsburg's From the Mixed-up Files of Mrs.Basil E. Frankweiler. Carol Hurst has compiled a list of many, many more mysteries for kids. 

I can't vouch for this list of horror picks—I would be too scared to read the books on the list!—but if horror is your thing, go for it! 

It's not just about daring to read scary books!

Teen Read Week is about all sorts of “YA/Young Adult” (teen) books. Here is one of my favorite teen books, from the time I was a teenager to the time my kids were teens, all the way up til now, when I am teaching other people's teens: 

The Outsiders, by S. E. Hinton.  

I also love:

Ender's Game (by Orson Scott Card), 

Mara, Daughter of the Nile (by Eloise Jarvis McGraw),  

and To Kill a Mockingbird (by Harper Lee). 







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October 18, 2012 - Happy Birthday, Chuck Berry

He took the music of rhythm and blues (R&B) and changed it [wave guitar like a magic wand: Shabam!] into rock'n'roll!

Lyrics about teenage life!
Guitar solos!
Cool little dances and hops and moves during performances!



Chuck Berry made a huge impact on music by being a pioneer of a new form. Some people claim that he created a template for rock stars of the future.

(A template is a pattern or model to follow.)

One aspect of Berry's life that rock stars should not copy (but that some, unfortunately, do) is that he went to prison several times for various different crimes—as varied as armed robbery (when he was still in high school!) to tax evasion.

Check out the Castillo Kids singing one of Berry's most famous hits, “Johnny B. Goode.” Here's Chuck himself singing the same song, and here's Marty McFly's “Johnny B. Goode,” from the movie Back to the Future, with an even wilder sort of showmanship! 

Beatle John Lennon once said: “If you tried to give rock and roll another name, you might call it 'Chuck Berry.'”

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October 17, 2012 - National Fossil Day


A fossil might be the mineralized bone of a dinosaur.


Or the tooth of a saber-tooth tiger.
It might be the hard shell of a clam, or it might be (if you're really, really lucky) the impression of a soft organism such as a jellyfish.





A fossil might be an insect petrified in amber, a log petrified in stone, or footsteps of the ancestors of humans petrified in shale.







Any trace of ancient organisms is considered a fossil, and people have found billions and billions of them, representing hundreds of thousands of different species. All these fossils, together, make a kind of textbook showing the way in which many different creatures have changed over the millennia. This change over time is what we call evolution.

Check out some fossils today. You can enjoy looking at the real deal at most natural history museums, most rock shops and some jewelry stores, and even some parks and recreation areas such as Dinosaur National Monument or Fossil Butte National Monument. Check out your local treasures (I know we Southern Californians have a fossil dig for kids at Jurupa Mountains Discovery Center, in Riverside, and also at Ralph B. Clark Regional Park, in Buena Park!).

Or you can do your fossil-finding with your mouse:


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Mulligan Day 




Hagfish Day 





October 16, 2012 - Day 3 of Earth Science Week

This is a good week to explore the natural world and to learn about the geosciences. It's also a good week to learn about careers in the Earth sciences.

Check out the official Earth Science Week website for activities and resources and events.


What are the Earth sciences?

Geology is the study of rocks and minerals, Earth structures (such as the mantle and core), tectonic plates (huge chunks of the Earth's crust that slowly move about, creating continents and oceans), and processes such as volcanic activity and erosion. 



Oceanography is the study of the Earth's oceans, including its salinity, sea floor structures and fissures, tides, waves, and organisms. 

Meteorology is the study of the Earth's atmosphere, climates, and weather. 

Astronomy is the study of the universe. It would seem that this is unrelated to the other Earth sciences, which revolve around the study of, you know, the Earth—but remember that the Earth and everything on it (including us!) is built of materials created inside stars; also, the study of other planets and bodies in the solar system help us to understand our own planet. 

I know that there are other names for particular sciences. My brother, for example, is a geophysicist—someone who uses physical principles to study the Earth. There are also geochemists, astrophysicists, astrochemists, physical oceanographer, chemical oceanographer, and many other specialists.

NASA provides information on various Earth Science careers. 


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