The sounds of the natural world are changing, and not for the better. Bernie Krause (left)  has tapes that document that trend.

While Krause has been recording and tracking the changes in aural environments around the world over the past several decades for his business, Wild Sanctuary, he has also been observing the concurrent changes in the soundscape around his Glen Ellen home. And he’s been astonished by what he’s found.

Just as the soundscapes have been changing over time, so has the recording equipment Krause uses. Digitization, he says, has made his professional life much easier.

You have to get up pretty early to capture the pure sounds of nature… and get a long way away from the rest of the noisy human race.

Gina Farr of Wild Sound Stories in Marin County finds a poignant significance in these recent recordings, because the changes they document tell a story of losses that will not be recovered.

This is one of her summer 2009 recordings of birds in the Grand Tetons of northwest Wyoming:

Tom Rusert, an avid birdwatcher and the volunteer director of Sonoma Birding, joined in the June workshop to see firsthand how the sounds now increasing featured in birding guides were being collected.

Hundreds of shorebirds were covered in oil after the Cosco Busan oil spill in the San Francisco Bay. Many died, but some were saved. Here, International Bird Rescue Association volunteer Tom Rusert releases one of the very first stricken shorebirds back into the wild after being cleaned.

Nanotechnology, the tiniest stuff that human technology has been able to create, is becoming a bigger and bigger part of our everyday lives.

SRJC Chemistry professor Dr. Karen Frindell (left)  will deliver a presentation on the small science of Nanotechnology at the Science Buzz Café Dec. 10 at 7 pm in the Sebastopol Youth Annex on Morris Street. She explains that the date is one of historic significance for this branch of science.

Another new aspect of nanotechnology is the creation of tiny motors fabricated from molecules of iron. But the same powerful magnification that has enabled researchers to see what they are doing with those nano-motors has also revealed that nature has already accomplished some of those same functions, on the same micro-miniature scale.

Richard Feynman

When it comes to building new reservoirs and hydroelectric plants, there are good dams and bad dams. A new online-calculator developed by Sebastopol’s Conservation Strategy Fund is a tool designed to help tell them apart.

What’s the difference between a good dam and a bad dam? CFS President John Reid offers examples of each.

Check out  the new web-based HydroCalculator here! development of this new online tool was made possible with support from the Richard and Rhoda Goldman Fund and the Gordon and Betty Moore Foundation.