Volume 101 | Number 6 | November-December 2013
A review of TOUCHING A NERVE: The Self as Brain, by Patricia S. Churchland
A review of THE MEASURE OF MANHATTAN: The Tumultuous Career and Surprising Legacy of John Randel Jr., Cartographer, Surveyor, Inventor, by Marguerite Holloway
A review of THE BOOK OF BARELY IMAGINED BEINGS: A 21st Century Bestiary, by Caspar Henderson
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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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