Tora and the other Nyanbo wonder why they behave so much like cats sometimes, and they decide to do some research on cats to find out. Will they find an answer?
about the relationship between trigonometric 
functions and entry into the atmosphere?
عن العلاقة بين الدوال المثلثيّة
والدخول إلى الغلاف الجوي؟
Die Verbindung trigonometrischer Funktionen
und den Eintritt in die Atmosphäre?
avec l’angle d’entrée dans l’atmosphère
dont j’ai parlé l’autre jour ?
sulla relazione tra funzioni trigonometriche
e l'angolo d'ingresso nell'atmosfera?
sobre a relação das funções 
trigonométricas e a entrada na atmosfera?