बांस खाने में पांडा की मदद करता था ‘भ्रामक अंगूठा’

पांडा जब बांस पकड़ते हैं तो वे कलाई की बढ़ी हुई हड्डी का सहारा लेते हैं.

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पांडाओं में इंसान की तरह सही तरह से विपरीत दिशा वाला अंगूठा विकसित ही नहीं हुआ.

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इसकी जगह उनमें कलाई की हड्डी से निकला अंगूठे जैसा पोर का विकास हुआ था.

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यह पोर 60-70 लाख साल पहले पनपा था, पर आज के मुकाबले काफी बड़े आकार का था.

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पांडा में अंगूठे की तरह विकसित हुई कलाई की हड्डी रेडियल सीजमॉइड कहलाती हैं.

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यह नया पोर जो अंगूठे का काम करता है, उसे फॉल्स थम्ब भी कहते हैं.

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इसी वजह से पांडा का बांस खाने लगे जबकि वे मांसाहारी भालू परिवार के जानवर थे.

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विशाल पांडा ने धीरे धीरे अपनी खुराक मांस और बेर की जगह बांस से बदल ली थी.

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पांडा हाथ का उपयोग खाने और चलने में करते हैं जिससे अंगूठा विकसित नहीं हो सका.

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क्लिक

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