Artificial Turf. Credit: Anthony V. ThompsonIt's easy to get scared. You look around the Oakland office of the Center for Environmental Health, and lead is everywhere. Piles of toys that are loaded with lead. Lunch boxes and kids' backpacks that have tested positive for high levels of lead. Samples of artificial turf.

And that's just the beginning. Lead has been found in venetian blinds, in pens, in the glaze of ceramic cups and bowls. It has been found in imported candies. And one Mexican folk remedy to cure stomachaches has landed a number of children in the hospital recently – a packet of powder that is almost entirely lead.

Since the effects of lead are cumulative, all those points of contamination add up.

Children's developing brains and central nervous systems are most susceptible to damage from ingesting lead. That's why a new federal standard for lead in children's products was recently put in place. And that's why the Center for Environmental Health, for one, focuses on products that come in contact with children on a daily basis.

The amount of lead in artificial turf, by itself, is unlikely to cause lead poisoning. And the same is true for the amount of lead found in lunch boxes, or in children's jewelry. But medical experts say that if kids play on artificial turf in the morning, distractedly put a charm bracelet in their mouths during class, and eat food from a lunch box with lead embedded in the vinyl – then those kids are at risk for lead impairment, such as a loss of IQ points, a sign of brain damage. For more, listen to the QUEST Radio story, or check our photos below.

For several years there has been a lot of buzz about the detection of extra-solar planets, or exoplanets: planets orbiting stars other than our Sun. However, due to the limits in technology and observational capabilities, to date only large, gas giant planets orbiting close to the stars (so called "Hot Jupiters") have been found, with a possible exception or two.

The main method for detecting exoplanets is by spectroscopically observing a tiny "wobble" in a star caused by the gravitational tug of a massive planet in orbit. Only Jupiter-sized planets have enough pull to produce a wobble in their star that we can detect—and the closer they are to their star, the shorter their orbital period and the more wobbles we can measure in a given period of time. The gravity of an Earth-sized planet is too feeble for this and planets at Earth-like distance orbit only once in many months.

But NASA is about to launch a new spacecraft, Kepler, whose mission is to detect Earth-sized planets at Earth-like distances from their stars. Kepler will launch on March 5th, and will eventually move into an orbit around the Sun. In essence, Kepler is a giant space camera designed to "stare" at a chosen patch of the sky continuously for years to come.

So what exactly is Kepler looking for in its unblinking stare contest with the stars in its vision? Kepler won’t be looking for microwobbles in those stars. Kepler will detect planets through the transit method. A transit is when a planet crosses in front of its star, blocking off a tiny amount of the star's light for a time.

A number of the hot Jupiters have been detected by their transits across their stars: a large planet can block a measurable amount of their star's light. But the drop in a star's brightness caused by an Earth-sized planet is far smaller—and if that planet only orbits its star every year or so, with its infrequent transit lasting only a few hours, an observer would have to stare long and hard to notice it.

Kepler will be based in space, and will be able to observe its target patch of sky continuously, uninterrupted by the cycles of day and night on Earth. Also by virtue of being in space, Kepler won't be hampered by Earth's turbulent and obscuring atmosphere—so there will be far less "noise" in the starlight, noise that can hide a minute drop in brightness. Finally, Kepler's sensitive digital camera system is an array of 42 CCD chips positioned at the focus of a 0.95 meter telescope, which will image an area of the sky about 12 degrees in diameter—equivalent to the area of sky you can cover with your open hand at arm's length.

Kepler will stare at a patch of sky near the constellation Cygnus, constantly monitoring about 150,000 stars for the next few years, looking for minute drops in brightness that may be the passage of Earth-sized planets.

Kepler won't reveal the composition or atmospheres of Earth-sized planets, or any telltale signs of life. Perhaps more importantly at this stage of our exploration of space, Kepler should give us an idea of how numerous Earth-sized planets are out there—whether or not they are as commonplace as depicted on Star Trek…

Good luck, Kepler, and stare on!

Learning at the tidepools. Credit: Amy Gotliffe

This question comes up endlessly in the world of environmental education. How do you inspire a person to learn, care and then take action for the environment? As someone whose professional goal is to inspire earth stewardship, I often ask anyone who will answer this big question.

Many are active stewards because they formed a connection with nature during childhood. This bond is deep, instinctive and primal, and was merely coaxed out by a particular, yet often simple experience outdoors: playing in the woods, on the rocks, in the creek, in the garden, in the dirt, up the tree, with the roly polys, in the ditch, in the pond, in the vacant armory (ok that was me), etc. Somewhere deep inside, a door was opened to the potential to really care. This is why Nature Deficit Disorder is so disturbing, as we wonder if children growing up void of trees and ditches and ponds have forged the same bonds.

When a child's natural curiosity is nurtured by an adult, they will likely develop an even stronger connection. Some will have this head start, yet it is never too late.

So, how does a person then become an active steward?

One model is practiced by Roots & Shoots, the activism branch of the Jane Goodall Institute, and that is: Knowledge, Compassion and Action. All three experiences, in no particular order, can lead to a sustainable behavior change. Take caring for frogs as an example and consider three different people and paths to change:

• Sam is academically inquisitive about frogs and conservation, and is self-motivated to research the subject on the internet. He begs his parents to take him on a local frog conservation program and through this action develops a deep compassion for frogs.
• Stella read a non-fiction story about a particular pond that was suddenly quiet one season, after years of being a frog croaking Mecca. She feels compassion for this species and habitat and attends a lecture on the subject. Once in the know, she donates funds to a frog conservation project.
• Nik is neither interested nor compassionate about frogs, but finds himself on a service learning outing with his 9th grade class. There, he sees dead and floating frogs with his own eyes and collects frog eggs with his own hands. The experience inspires him to pay attention in class the next week and learn more about it, eventually leading him to feel greater connection and compassion.

With this model in mind, I suppose my job is to ensure that all three options are easily available to our visiting students and guests. So I encourage all you attend an adult lecture or ZooCamp program, take action with the Arroyo Viejo Creek Keepers, or feel compassion by staring through long eyelashes into the deep brown eyes of a camel… or frog.

The front of Leaf House. Photo credit: The Leaf Community
Highlights from the American Recovery and Reinvestment Act of 2009, signed by President Obama on Tuesday:

1. The economic stimulus act provides $5 billion for the Weatherization Assistance Program; increases the eligible income level for the program from 150% of poverty level (determined by criteria established by the Office of Management and Budget) to 200% of poverty level; increases the amount of money that can be spent per home from $2,500 to $6,500; and allows weatherization assistance for homes that were weatherized before 1994 (previously, homes weatherized after 1979 could not be "re-weatherized").

2. $4 billion was allocated to the Department of Housing and Urban Development (HUD) to retrofit public housing, and $510 million to retrofit the homes of Native Americans.

3. The stimulus bill gives $500 million to the Department of Labor to train workers for careers in energy efficiency and renewable energy.

4. The American Recovery and Reinvestment Act of 2009 provides increased tax credits for homeowners for energy efficiency improvements and renewable energy installations; the act increases the tax credit for energy efficiency improvements from 10% to 30%, and gives a 30% tax credit for the cost of qualified solar energy systems, geothermal heat pumps, small wind turbines, and fuel cell systems.

5. The tax credit for homeowners who install a natural gas refueling system for a natural gas car, a charging system for a plug-in electric or hybrid vehicle, a hydrogen refueling station for a fuel cell car, or another refueling system in their homes is doubled from $1,000 to $2,000. The credit is good through 2010 for most refueling systems and through 2014 for hydrogen refueling systems.

There are many more provisions in the bill that support building energy efficiency, automotive energy efficiency, the manufacture and use of renewable energy systems, and research into (among other things) high performance batteries.

We recently covered in Home Energy Magazine a story from Italy about the Leaf Community. It is a live/work community outside of Rome where they create all the energy they need by taking it from the sun, the wind, and the ground (using geothermal heat pumps). They are doing a lot of research into storing energy, and that is clearly becoming a top priority among scientists. Energy produced from the sun and wind, for example, is intermittent, and sun and wind resources are often far from populations that need clean energy, requiring expensive transmission systems (more overhead wires). At Leaf House, they produce hydrogen using the electricity produced by photovoltaic solar panels, and store the hydrogen in a "chemical battery". The hydrogen can later be reclaimed and used in a fuel cell to create electricity.

Retrofitting homes to be more efficient, healthy, and sustainable is a "three-fer", as President Obama called it in a recent television interview: it saves energy; makes homes more affordable; and creates jobs. And research such as that taking place at Leaf House opens the door to unimagined, elegant solutions to our energy challenges. One thing that the economic stimulus package has already delivered — something that has long been lacking in the energy efficiency and renewable energy community — is hope.

Sea level rise scenarios for San Francisco International Airport.
Click the map to see a larger image.

The most recent estimate looks pretty dire. The Bay Conservation and Development Commission (BCDC), a state planning agency, says it expects San Francisco Bay to rise about 16 inches by 2050, and 55 inches by the end of the century.

The map on this page shows what San Francisco International Airport and the surrounding area would look like, if the bay rose a meter (roughly 36 inches). You can check other maps around the bay as well.

And the real danger of that big rise in bay waters happens during storm season. High tides and storm surges could send that higher water inland, flooding Highway 101 and neighborhoods along the bay. If the bay runs right up to the edge of development and we build sea walls to protect property, then that deep pool of water will have much higher waves, stronger currents and will pound the shoreline much harder than where there is now graduated wetlands. The effect, experts say, would be similar to what happens when you churn up water in a bathtub, and the wave energy quickly builds up and spills over the sides.

Part of the challenge in BCDC’s design competition is to come up with barriers that might absorb some of the power of those waves, instead of simply deflecting those waves with straight walls.

Listen to the Redesigning the Bay radio report online.

The Stanford Linear Accelerator. Credit: SLAC.

On the heels of the opening of the Large Hadron Collider last year, I was curious about these particle accelerators: how they work, what research is conducted there, and most importantly why.

Luckily, there is a particle accelerator right here in the Bay Area. Last year, I took an intrepid group down to the Stanford Linear Accelerator (SLAC) to learn more about the these giant expensive research labs.

SLAC maintains an extensive public outreach program. An extensive tour (mine was 2 hours with very in-depth exploration of the facility), public lectures, weekly colloquia, and even science competitions for high schoolers.

I was surprised to find a wealth of research beyond the typical particle colliding at the facility. Many researchers use the state of the art facilities to study basic elements of our life, including water.

On Tuesday, Anders Nilsson is discussing his research on water at SLAC, an in-depth look at some of the stranger properties of water: its high heat capacity, how it is more dense than ice, even insight on using water as a power source (by splitting it into hydrogen and oxygen). Water: The Strangest Liquid, Tuesday February 24th 730-830PM at the Stanford Linear Accelerator.

However, our continued economics woes are threatening physical science research. SLAC is getting the brunt of money cut, missing out on $23 million of requested funding. In response, SLAC laid off 125 of its 1600 employees and shut down its PEP-II collider last year.

SLAC Public Lecture Series
The SLAC Public Lecture Series opens the doors to the inner workings of SLAC for the local nonscientific community. Find out what SLAC is all about: the research, the facilities, and the people that make this a world-class research institute.

SLAC Colloquium
The intellectual watering hole for the entire laboratory, where you can hear talks intended for a general audience on a wide variety of subjects. The colloquium will be returning later this year.

SLAC Science Bowl for High School Students
SLAC hosts an annual Regional Science Bowl for teams of high school students. The Science Bowl is a question-and-answer competition with buzzers, judges, and time keepers for high school teams of 5 students and 1 faculty coach. This year's competition is on February 28th.

SLAC Tour Information
Tours of SLAC will be available again later this year. On the tour, you get an extensive look at the operation of the accelerator, including a peek into the Klystron Gallery.

Coco-de-mer, the world's largest seeds
Last Thursday, February 12th, was the inaugural evening of NightLife at the California Academy of Sciences, a weekly science evening for adults. It was also Charles Darwin's 200th birthday. To honor the father of evolution, Academy researchers unveiled Darwin's Carnival, a collection of curious specimens brought out from our collections, including Botany, Ornithology & Mammalogy, Entomology, Herpetology, Invertebrate Zoology, Geology, and the Library Archives.

There was a great variety of unusual specimens elucidating adaptation and evolution. One caught my eye, however, because I used to pass by it every day at our Howard Street location on the way up to my desk. I had presumed it was a cacao seed, but in truth it was a Coco-de-Mer, better known as the world's largest seed.

Coco-de-Mer, also known as "the double coconut", is the seed of the Lodoicea maldvica plant, a large fan palm that reaches 25 m (82 ft) in height. The palm is only found on two islands -– Praslin & Curieuse in the Seychelles. The palm is best known for the seed of its fruit, which is the largest in the world, weighing in at 15 to 30 kg (33 to 66 lbs).

The palm species was named maldvica after the Maldive Islands, the place the seeds were first found (before the 18th century the Seychelles islands were still uninhabited). Seeds that had germinated (and were therefore hollowed out) would find their way into the water, and prevailing sea currents carried a great many of them to the Maldives. The seeds were used by indigenous people on the islands for medicinal treatments and in trade.

Many stories abounded about the source of the seeds before the truth was discovered in the Seychelles islands in 1768. Many believed the seeds came from a mythical tree that grew at the bottom of the sea. European nobles would often have the Coco-de-Mer seeds cleaned and encrusted with jewels– befitting their mythical origins — in order to display them as collectibles in private galleries. Today, the Coco-de-Mer is still considered a treasure and the seeds and plants from which they grow are protected as a rare species.

This month marks the 200th birthday of Charles Darwin and the 150th anniversary of On the Origin of Species. If Darwin were alive today, I think he would be very pleased.

He would undoubtedly be very excited about everything we've learned about biology since his time. Like the rest of us, he would be awed by the beauty, grandeur, and complexity of life on Earth.

He would also be pleased that his ideas about natural selection and evolution are to date the only scientific explanation for all of this. His ideas pervade every aspect of modern biology from medicine to genomics to ecology.

His theories dominate because they are supported by mountains of evidence (Read Why Evolution is True to find out more about the data that supports evolution. You can click here for a review of the book.). The evidence in support of evolution is so overwhelming that there is no real debate about it among biologists.

Of course, like any scientific theory, not every "t" is crossed nor every "i" dotted. But that is more of a reflection on how science works rather than the theory itself.

A scientist gathers some data and then proposes a hypothesis to explain that data. Then the scientist does some experiments to test the hypothesis. The new data either supports the hypothesis, requires that the scientist modify the hypothesis to fit the new data, or requires the scientist to come up with a new hypothesis that better explains the data. Then scientists repeat this process over and over again until the hypotheses can be unified into a theory.

This has gone on for 150 years or so for evolution and if anything, evolution is stronger than it was before. Sure, every now and then a hypothesis within the theory needs to be modified but the theory remains as strong as ever.

In fact, no point of contention has yet been raised that is the straw that will break evolution's back. And there is nothing obvious on the horizon that will.

Darwin would also probably not be surprised that his theory remains controversial because it seems to fly in the face of a Creator. Which is of course nonsense. Despite worries about how Earth being the center of the Universe would cast doubts on the Creator, Christianity survived Copernicus and Galileo. And it will survive Darwin as well.

I heard this interesting interview on NPR over the weekend with Richard Dawkins about his book, The God Delusion. In the interview, Dawkins states that it seems unlikely to him that God would create a Universe that could be explained by natural causes. I disagree.

My understanding is that Christianity is based on faith. If a Creator made the Universe in such a way that scientists could show the Earth was 10,000 years old, then of course a Creator exists. That is the only possibility. So where is the faith in that? How would it be different than the Creator greeting each person and welcoming him or her to the Creator's Universe?

To me it makes sense that a Creator would make a world that was or could be formed naturally. In which case it doesn't really matter scientifically whether life arose on Earth through a Creator or by chance. Both ways require evolution. Thank you Charles Darwin for giving us this great framework within which we can understand life here on Earth.

By Rori Gallagher.

Even in these difficult economic times, California's population continues to grow, and those additional people are going to need a place to live. Recent legislation in California directs city planners to make environmentally responsible choices for new housing. One way to do that is to create transit villages.

The idea is to design housing near a transit station with easy access to retail and commercial space. That way people can drive less if they want to. Some transit villages are easy to identify as pre-planned developments, like the transit village in South San Francisco. Others developed more organically, like the area surrounding the Rockridge Station in Oakland.

As with all new development and redevelopment, there's always a concern about gentrification. Most cities have a requirement that a certain percentage of new units are offered below market rate. But some longtime residents of established communities, like San Mateo, worry about new development changing the character of the community. In order to make transit villages work, designers have to carefully blend new development with the existing community, creating a truly pedestrian-oriented destination. Check out a map of transit-oriented development in California. Also, here are some fun audio walking tours of transit-oriented development projects in the Bay Area.

Listen to the Mass Transit Housing Plan radio report online.

Bay Area birders participate in the Audubon Christmas Bird
Count. Credit: terriem on flickr.com

Though it's easy to forget, any kid with a magnifying glass can tell you that you don't need a fancy degree to be a scientist. All it takes is a curious mind and a keen eye for observation. And in case the mere thought of a world full of wonders isn't enough to get you motivated, there are dozens of ways your personal observations can contribute to formal, published research. It's called "citizen science".

The idea behind citizen science is that ordinary folks, spread all across the country (or the world!), can collect valuable data on a breadth and scale that would be impossible for a single researcher to do on her own. It's particularly suited to projects that require lots of field observations but not a lot of special tools – things like counting creatures or measuring snow. And while the Internet has made the process of recruiting volunteers and reporting data easier than ever, for most projects, no technology is necessary. One of the oldest citizen science projects, the Audubon Society's Christmas Bird Count, has been happening for over a hundred years!

In case you have any doubts about whether a scattered group of untrained citizens can really produce valuable data, just check out this week's headlines about how climate change is affecting bird populations (they're moving north). The news is based on an Audubon Society study that looked at 40 years worth of citizen-produced information.

So how can you get involved? There are all kinds of projects, some that are ongoing, others that happen at a particular time. Here are a few to consider:

• From February 13th – 16th, 2009, you can participate in the 12th annual Great Backyard Bird Count, another Audubon Society project (in partnership with the Cornell Lab of Ornithology), either on your own or by joining up with the Sacramento Audubon Society's organized events.
• As fellow blogger Ben Burress reported last month, from March 16-28, 2009 you can monitor light pollution through Globe At Night.
• Track a plant through the seasons with Project Budburst.
• Visit AntWeb's Bay Area Ant Survey to find out how to help discover and document the native and invasive ants in the Bay Area.
• Monitor frogs in your area with Frogwatch USA.
• Keep track of the weather with the Community Collaborative Rain, Hail, & Snow Network.
• Follow the Monarch butterfly migrations with a variety of projects.

There's so much science out there, just waiting for you to get involved. Go observe!