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 A Winter Praying mantis
Dr. David R. Brooks
On 4 February 2008 my wife Susan found a small praying mantis on her desk. It was about 1.5 cm long, and it could fly quite well. We always have lots of praying mantis egg cases outside on the tall grass stalks... |
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Joint Review of Superstring Theory: The DNA of Reality and Mathematica Version 6.
George E. Hrabovsky, President, MAST
Superstring Theory, The DNA of Reality
A few weeks ago Shawn Carlson asked if I would review some material sent by a noted physicist on string theory for the lay public. While a readily assented, I did not hold out much hope for the material, as my experience of string theory for lay people is not very high, with one previous exception.
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A Do-It-Yourself Vacuum Tube
Mark Valentine
I loved Forrest Mims' article about vacuum tubes.
Readers can make their own diode vacuum tubes with a dual-filament automotive tail light. These lights have two filaments and three connecting terminals. One end of each filament shares an electrical terminal with the other; the other end of each filament has its own unique terminal.
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Poorman's Space Program
Designing and Constructing BalloonSat Airframes (Part 1)
Paul Verhage
Near space experiments need a container to hold and organize them. This article is about that container, the BalloonSat airframe. After a short description of BalloonSats past and present, this article discusses the materials, tools, and methods used to machine and assemble a BalloonSat airframe.
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This Week at Hilton Pond
Bill Hilton Jr.
Executive Director
Hilton Pond Center for Piedmont Natural History
York, South Carolina 29745 USA
Costa Rica Hummingbirds 2008—Beyond the Aloe Vera: Krazy ‘08s Delta (11-14 February 2008)
The third report on our 2008 Costa Rica hummingbird banding expedition is now posted. It includes a summary of all our ruby-throated hummingbird work to date in Guanacaste Province, plus descriptions of our efforts to find other hummer havens away from the aloe fields.
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