Volume 91 | Number 4 | July-August 2003
A review of Life's Origin: The Beginnings of Biological Evolution, edited by J. William Schopf.
A review of Six Degrees: The Science of a Connected Age, by Duncan J. Watts.
Erasmus Darwin, Joseph Priestley and James Watt are among the energetic entrepreneurs at the center of Jenny Uglow’s The Lunar Men
The most interesting thing about Nick Lane’s Oxygen, says reviewer Christian de Duve, is that it rejects the “oxygen holocaust” theory
On the 50th anniversary of the discovery of the structure of DNA, James D. Watson's new book DNA: The Secret of Life and Victor K. McElheny's biography Watson and DNA: Making a Scienific Revolution help us gauge the man and his impact on biology.
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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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