Volume 101 | Number 3 | May-June 2013
This issue marks the debut of our new, brief and occasional books section
A brief review of Into Great Silence: A Memoir of Discovery and Loss among Vanishing Orcas, by Eva Saulitis
A brief review of Hubble's Universe: Greatest Discoveries and Latest Images, by Terence Dickinson
A brief review of em>Antarctica: An Intimate Portrait of a Mysterious Continent, by Gabrielle Walker, and Secrets of the Ice: Antarctica’s Clues to Climate, the Universe, and the Limits of Life, by Veronica Meduna
A review of Turing’s Cathedral: The Origins of the Digital Universe, by George Dyson
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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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