David Attenborough's Natural Curiosities S04E04 Curious Counters (720p HD, soft Eng subs)
Can animals count? This is a question that has intrigued and fooled investigators for a long time. Just over 100 years ago, a German horse called Hans was declared a mathematical genius but all was not as it seemed. And strangely, some bamboos around the world flower exactly at the same no matter where they are. Are they counting down the years?
First broadcast: 17 March 2018
Duration: 30 minutes
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