Volume 94 | Number 6 | November-December 2006
A review of One Planet: A Celebration of Biodiversity, by Nicholas Hulot. This collection of images highlights what we stand to lose every time another species disappears
A review of Einstein's Jury, by Jeffrey Crelinsten. Einstein was catapulted to fame when observations of bending starlight gathered during a 1919 eclipse verified his theory of general relativity. But that experimental confirmation was not nearly as clear-cut as many people believe
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ANIMATION: Hydrangea Colors: It’s All in the Soil
The Hydrangea macrophylla (big-leafed hydrangea) plant is the only known plant that can 'detect' the pH level in surrounding soil!
One of the world’s most popular ornamental flowers, it conceals a bouquet of biological and biochemical surprises. The iconic “snowball” shaped hydrangea blooms are a common staple of backyard gardens.
Hydrangea colors ultimately depend on the availability of aluminum ions(Al3+) within the soil.
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