Solar Grasshoppers and Robogirls

Things are sure heating up as we head into week 5 of Xplorations Summer Science Adventures, otherwise known as summer camp, here at the Musuem.  It’s so exciting to have the energy of over 400 kids a day buzzing around you.  It’s awesome to see their creativity and excitement as they delve into their science projects.

I got jazzed when I read about the robotic grasshopper in “Science Friday” last week.  It just so happens that some of the campers at the Museum make a grasshopper “robot” of sorts in our Roving Robots camp for 6 and 7 year olds.  Our tiny “robot” works on solar power and he never stops shaking!  Check out the video.

This is just one of the many projects they make in their fun filled week at camp.  They also build circuits, experiment with gears and motors, and even program a special robot that looks like a bee!

Speaking of robots, check out the cool robo-girls in the next video.  The Museum loves its science girls.  They have programed their NXT Mindstorms robot to do all sorts of cool things.
In this video they are testing their robot to see if it can follow a thick black line using a light sensor.  They will then go back and make corrections to the program and try again.  I love seeing more and more girls sign up for our robotics and engineering classes.  We have to give those boys a run for their money!

Check back to see more exciting stuff that goes on at camp.  There is never a dull moment here!  I would also love to hear ideas for new and super cool summer camps.  Give me your 2 cents.  What should our next summer camp topic be?

Science Doesn’t Sleep (6.30.08)

Barri Gòtic
Creative Commons License photo credit: baldheretic

So here’s what went down after you logged off.

If you found an ancient whistle in the bony hand of a Aztec skeleton, would you play it? Roberto Velazquez did, and lived to tell the tale.

Articles about CERN’s Large Hadron Collider – and whether or not it will destroy the universe – have been flooding the internet. The Daily Galaxy puts it best: “particle theorists are NOT Bond villains.”

100 years ago today – Earth got in the way of a small piece of cosmic debris, which exploded about 5 – 10 km from the ground. From Bad Astronomer: “The air blast flattened trees for hundreds of square kilometers. The ground shook, witnesses felt the hellish heat from kilometers away, and the shock wave circled the world.” And that was a small piece.

Discover Magazine has an interesting new list – 20 Things You Didn’t Know About Oil. (And no, #1 is not how much it will cost next week.)

In case you missed Shelley’s awesome comment on the blog last week – you can now follow the Phoenix Mars Lander on Twitter, @MarsPhoenix. A recent post: “Want to see if subsurface ice shows evidence of periodic meltings &/or other indicators of possible past or present habitat for microbes.”

National Geographic features HMNS and Leonardo

If you’ve been reading the blog, you’re up to speed on our Paleontology Department’s recent exploits in Montana. They were there to prospect around the site where Leonardo – the famous mummified dinosaur that will go on world premiere display at HMNS this fall – was discovered. And, they found several new sites, helped set up Malta’s newest dinosaur museum – where Leonardo will be on display after his visit to Houston.

Today, National Geographic posted a very cool story about Leonardo and our upcoming exhibit – it includes footage of the Montana expedition as well as interviews with Dr. Bakker and HMNS President Joel A. Bartsch. Check it out here – and let us know what you think!

The world’s oldest alternative energy source

As oil reaches a new record of $143 per barrel today, I think it’s safe to say that energy – and possible alternatives to fossil fuels – are topics on everyone’s mind. Before the development of fossil-fuel based energy technology, wind-power wasn’t an alternate form of energy – it was just the way things were done.

Julian Lamborn, Master Docent for the Wiess Energy Hall, has been kind enough to share the history of wind technology as well as share his case for developing wind energy today, in this two-part post.

Shakespeare had it right when he penned: “Blow, blow thou winter wind, thou art not so unkind.”

The winds of the world today bring with them the promise of low cost, renewable and sustainable electricity which will help feed the world’s insatiable demand for energy. One perk of using wind energy is it has a low atmospheric pollution potential.

In 2007, the globally installed capacity of electricity generation from wind increased by some 26.6% over 2006.

Ontario Turbines (2)
Creative Commons License photo credit: JoshMcConnell

The global capacity of wind-generated electricity is currently equivalent to some 1.3% of the world’s electricity needs with Germany producing the most wind power.  In fact, Germany has 22,247 megawatts of installed wind generating capacity which meets between 5% and 7% of the country’s electricity needs. 

Here in the USA (which, at 16,818 MW, is second only to Germany in installed, wind-generating capacity) about 1% of our electricity needs are met by wind generation and in Texas particularly, this number rises to 3%. Texas is also the state that uses the most wind energy.

Blood Hill Wind Farm, West Somerton, Norfolk

Creative Commons License photo credit: .Martin.

It’s all very well talking about a megawatt of wind generated power, but what can it actually do for you in your home?  In very round numbers, one megawatt of wind generating capacity typically will satisfy the electricity needs of 350 households in an industrial society, or roughly 1,000 people per year.  Although wind generators are placed in windy areas and designed to run optimally at wind speeds between 25 and 35 mph, wind does not blow all the time.  In the USA wind generators work at about 30.5% of their capacity.

But, of course, this is the modern story. 

Creative Commons License photo credit:
Wouter de Bruijn

The first windmills were developed to automate the tasks of grain-grinding and water-pumping. The earliest-known design is the vertical axis system developed in Persia about 500-900 C.E. (although there is some suggestion that King Hammurabi of Babylon in c 1760 B.C.E used wind driven scoops to move water for irrigation).   The first known documented design of a Persian windmill is one with vertical sails made of bundles of reeds or wood which were attached to the central vertical shaft by horizontal struts. 

Windmills as we know them today from paintings by the Dutch Masters first appeared in the late Middle Ages, although it took another 500 or so years for the highly efficient mills of the Dutch to be fully developed. 

However, by the late 19th century, all the technology was in place to allow the design of the first power-generating wind-mill. This first use of a large windmill to generate electricity was a system built in Cleveland, Ohio, in 1888, by Charles F. Brush. Compared to today’s behemoths producing up to 3.6 MW or more, Bush’s machine was a lightweight producing just 12 KW!

The modern wind powered generating devices, such as those near Abilene, typically each produce 1.5 to 2 MW of power at around the same 4.5 cent cost per kilowatt-hour as electricity from coal but without the co-production of greenhouse gases