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Brief Communications
Nature 403, 39-40 (6 January 2000) | doi:10.1038/47405
Open Innovation Challenges
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Fast Growth of Transformed Soybean Shoots
A method for accelerating growth of soybean shoots is desired.
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Protect Enzyme from In Planta Degradation
A proposal for stable expression of an enzyme in corn seed is desired.
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Postdoctoral Research Fellow ? Andy Chan?s Lab / Immunology
- Genentech
- South San Francisco, CA, USA
Director of Bioinformatics
- University of the Witwatersrand, Johannesburg
- Johannesburg, South Africa
Cognition: Numerical memory span in a chimpanzee
Nobuyuki Kawai1 & Tetsuro Matsuzawa1
Abstract
A female chimpanzee called Ai has learned to use Arabic numerals to represent numbers1. She can count from zero to nine items, which she demonstrates by touching the appropriate number on a touch-sensitive monitor2, 3, and she can order the numbers from zero to nine in sequence4, 5, 6. Here we investigate Ai's memory span by testing her skill in these numerical tasks, and find that she can remember the correct sequence of any five numbers selected from the range zero to nine.
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