Volume 87 | Number 2 | March-April 1999
A review of Paths of Innovation: Technological Change in 20th-Century America, by David C. Mowery and Nathan Rosenberg.
A review of A House Built on Sand: Exposing Postmodernist Myths about Science, edited by Noretta Koertge.
A review of Great Feuds in Science: Ten of the Liveliest Disputes Ever, by Hal Hellman.
A review of Foraging for Survival: Yearling Baboons in Africa, by Stuart A. Altmann.
A review of The Aspiring Adept: Robert Boyle and His Alchemical Quest, by Lawrence M. Principe.
Total Records : 16
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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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