A trio of researchers with the Okinawa Institute of Science and Technology, the Hebrew University and Tiergarten Schönbrunn, Maxingstrasse, has found that giant tortoises are not only trainable, but have long memories. In their paper published in the journal Animal Cognition, Tamar Gutnick, Anton Weissenbacher and Michael Kuba describe training exercises they carried out with the huge tortoises and what they learned from them.
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Source: Phys.org