The San Francisco-Oakland Bay Bridge is closed this weekend for a major project, part of the seismic upgrade of the bridge. This will make the bridge safer in case of a major earthquake.
In 1989, the Loma Prieta Earthquake damaged a 50-foot section of the upper deck on the Eastern side, making it collapse onto the lower deck. This weekend’s project is part of a major construction project that will eventually replace the Eastern span of the bridge, scheduled for completion in 2013.
We’re watching the construction crews in action on the construction cams. There’s a cool computer simulation of the work that is being done this weekend, and when the job is done, all the video that is being shot will be available in a time-lapse video on http://baybridgeinfo.org.
Here’s another video from the upcoming They Might Be Giants CD/DVD “Here Comes Science:” Science is Real. It’s only viewable on Amazon.com for now (click on the link to view it).
We love space and rockets, but we’ve been following this week’s planned Space Shuttle launch more carefully because one of the astronauts speaks both English and Spanish. He’s been posting short messages in both languages on Twitter using the name @Astro_Jose. If you know English or Spanish (or both) it’s fun to see what he has to say about the process of going into space.
Jose attended graduate school at UC Santa Barbara; the alumni magazine has an article on alumni astronauts, including Astro_Jose.
Hooray! We’ve been waiting for the new They Might Be Giants CD/DVD, Here Comes Science, to come out. Today they posted the first video from the collection, “Electric Car”.
We can’t stop thinking about an episode of the PBS show “Nova” we watched a couple weeks ago called “Musical Minds”. Oliver Sacks is a famous neurologist, a doctor who specializes in treating the body’s brain and nervous system. In “Musical Minds”, he talked with a young autistic man who is a brilliant piano player, a man with Tourette Syndrome whose symptoms stop when he plays the drums, and a woman who just heard noise when someone played music for her. The coolest story was about the man who got hit by lightning and suddenly was able to play beautiful music for the first time in his life.
You can watch a video clip, read a transcript of the show, and see Dr. Sacks’ answers to viewer questions on PBS.org, a great site for kid scientists to get information!
One of our favorite shows is Mythbusters on The Discovery Channel. If you haven’t seen it, the guys (and Kari!) test a few urban myths and legends each week (like, would a house full of exploding popcorn make the windows bust out?) and proclaim them “Confirmed” or “Busted”. If you don’t get The Discovery Channel, you can see some videos here.
We went to the beach last weekend and got a sunburn on a spot we missed with sunscreen. What causes sunburn, and how does sunscreen help stop sunburns from happening?
When you’re outside, your skin is exposed to ultraviolet radiation (sometimes called UV radiation) from the sun’s rays. Even on cloudy days! Covering up your skin with long sleeves or a hat can help protect it from UV radiation and sunburn. Sunburns can be really painful, and can cause some types of skin cancer if you get too many of them in your lifetime. Some of the more common effects of a sunburn are redness, itchiness, and peeling skin. Your skin literally dries up and peels off! (EW!) Really bad sunburns, like other kinds of burns, can give you blisters on your skin.
Your skin has melanin, or pigment, that gives it color and protects it. You notice that the color of the skin on your arms is different from your friends, or even your brothers and sisters and mom or dad. If you have very pale skin, especially if you have freckles, you will be more likely to get a sunburn when you’re out in the sun. People with darker skin have more melanin. When they’re in the sun their skin may get a little darker and they’ll get a suntan. Many doctors say that even a little suntan is too much, and advise you to always wear sunscreen and a hat when you’re going to be in the sun for long periods.
Sunscreen coats your skin and blocks out the ultraviolet rays of the sun. Your bottle of sunscreen probably lists its “SPF” or “Sun Protection Factor”. The higher the SPF, the more protection it gives. Many sunscreens for kids have an SPF of 50 or higher. You need to apply more sunscreen after you’ve been swimming or if you’re sweating a lot. Staying out of the sun between 10 a.m. and 2 p.m. will reduce your risk of sunburn.
We love the Academy of Sciences in Golden Gate Park. It has a planetarium, an indoor rain forest, and a wonderful underground aquarium with fish from all over the world.
The living fish exhibits are terrific, but this display really got our attention. It shows the contents of a tiger shark’s stomach. There are turtle shells, a shoe, a license plate, an unopened can of Spam (not that a shark could open a can of Spam if he tried), and even two Barbie dolls!
Most sharks go after food that is easiest to catch, like slow, weak or dying marine animals. Sharks use their teeth to grab and tear their prey, but they don’t chew it up and usually swallow it almost whole. Many species of shark are bottom feeders, meaning they literally scoop up food from the bottom of the ocean. According to Seaworld.org, tiger sharks are the “garbage cans of the sea” because they will eat whatever is available. From the looks of this picture, we’d say that was a good description!
From our friends at Boston.com’s “The Big Picture” come these awesome photos of an undersea volcano erupting.
This eruption took place this week and was accompanied by a strong earthquake. It happened near the island nation of Tonga, located in the South Pacific.
Our class went on a field trip to our local Science Center. We got to see lots of nature displays, but our favorite was the one about owl pellets. We even got to take some owl pellets home.
Owls are birds of prey, which means they hunt and eat small animals like mice. Owls can’t chew, though. They have to tear their prey into smaller pieces with their beaks and talons (claws) before they swallow them. One part of the owl’s stomach is called the proventriculus, or glandular stomach. That’s the part of the stomach that digests the parts of the prey the owl uses as food. The parts of the prey that the owl can’t digest, like bones, teeth, and fur, stay in the owl’s gizzard, or muscular stomach.
An owl pellet is the compressed (smooshed together) bones, teeth and fur of its prey. The owl regurgitates the pellet. It’s not like throwing up, though. The owl does this regularly, and the pellet just drops out of its beak.
We dissected owl pellets at the science center, and this is what we saw. It’s a little fuzzy, but you can see a bone, some teeth, and some fur. A little icky, but definitely interesting. Owls have to eat, too, you know.
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We love space and rockets, but we’ve been following this week’s planned Space Shuttle launch more carefully because one of the astronauts speaks both English and Spanish. He’s been posting short messages in both languages on Twitter using the name 
We can’t stop thinking about an episode of the PBS show “Nova” we watched a couple weeks ago called “Musical Minds”. Oliver Sacks is a famous 
It shows the contents of a tiger shark’s stomach. There are turtle shells, a shoe, a license plate, an unopened can of Spam (not that a shark could open a can of Spam if he tried), and even two Barbie dolls!
It’s a little fuzzy, but you can see a bone, some teeth, and some fur. A little icky, but definitely interesting. Owls have to eat, too, you know.