The Life and Legacy of Rachel Carson (start time 6:20). The book Silent Spring, published in 1962, is widely credited for setting the stage for the modern environmental movement. Its author, Rachel Carson, an unassuming field biologist and writer, uncovered how in the process of killing crop pests, chemicals such as DDT were also killing birds, fish and other wildlife. Fifty years after Silent Spring was published, several of the worst offending toxins are off the market – at least in the U.S. – but many more persist and new ones have emerged. And they’re wreaking havoc on human health, not just wildlife. How On Earth co-host Susan Moran talks with William Souder, author of the new book On a Farther Shore: The Life and Legacy of Rachel Carson, which was just published last month to mark the 50th anniversary of the release of Silent Spring.
Hosts: Susan Moran, Joel Parker
Producer: Joel Parker
Engineer: Jim Pullen
Executive Producer: Jim Pullen
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Bees and Pesticides (start at 6:40). Two studies published last week in the journal Science (
Radiometers and Weather (start at 12:50). Predicting the weather is a tough job, and climate change is bringing unseasonal conditions that make it even more difficult to predict. But a monitoring device produced here in Boulder may be able to improve local weather forecasts significnatly. These radiometers work by creating 3-D profiles of the moisture in the air, which is a key element for meteorologists and climate modelers alike. They are now being put to various weather-related uses all over the planet. Stick Ware is the founder and lead scientist of the Boulder-based company, 
![The Science of Habit Formation [extended version]](https://howonearthradio.org/wp-content/uploads/2012/03/The-Power-of-Habit-cover.png)
The Accelerating Expansion of The Universe (start at 5:11). Have you ever had the feeling that things are moving faster and faster these days? Well, maybe it’s not your imagination. Proof that the universe is not just expanding but is accelerating garnered a 
Underwater Volcanoes (start time 5:45). Most of our planet’s volcanoes are out of sight, and largely out of mind. Hidden under sometimes thousands of feet of water, volcanoes on the sea floor bubble and boil away without our knowledge and largely without our understanding. We talk with Oregon State University volcanologist 
Sleep (start time 15:50). As any mother knows, when children get cranky, one of the best solutions is to “go take a nap.” What is less understood is whether or not those naps can be now and then, or whether it’s important to keep them regular. We speak with an expert who has just published a study that looks at the question of napping among preschool children. Her name is 
One often hears people state “I’m not good at math” or that they don’t like math because it they don’t think it has any relevance to their day-to-day life (other than, maybe, to balance a checkbook). However, both of those myths are addressed head-on in a new book titled “
Feature #1 (time mark 5:30) When people think of Colorado, they usually don’t think about “oceans”. After all, Colorado doesn’t have much of a coastline these days, though it was definitely had oceanfront property a few hundred million years ago. However, being in a landlocked state doesn’t mean that there isn’t any thing we can do to impact the health and ecology of the ocean and marine biology. Co-host Joel Parker talks with Vicki Goldstein, founder and president of the 
Feature #2 (time mark 14:10) Nitrogen – we can’t live without it, but you can have too much of a good thing. In its gaseous form nitrogen is harmless and makes up nearly 80 percent of the atmosphere. The worldwide population never would have reached 7 billion people without nitrogen, in the form of chemical fertilizer. But excess nitrogen –from fertilizer runoff, manure, human sewage and other sources is wreaking havoc on the environment. Co-host Susan Moran talks with John Mischler, a PhD student at CU Boulder, who is researching worms and snails in Colorado and Africa. He talks about how excess nutrients in ponds, lakes and elsewhere can lead to the spread of parasitic disease from trematodes to snails to us.
In today’s show take a look at the future of wind energy. We have with us in the studio 