1977, Bophuthatswana ( South Africa )

Rumination is the great skill to eat tough grass and leaves, which many animals gained through loooong time of evolution. This clip shows how an Impala does it. A chunk of food moves up and down its neck, being chewed. Food is fermented in their stomach by bacteria, then their guts get the nutrients. Methane is produced in these processes.

This Ox on a Bophuthatswana stamp has serious face, but has to move its jaw almost all the time – up to 12 hours a day! That fact gives me a different impression of this stern face.

Through this stamp, I learnt about the history of Apartheid – The “Homeland” policy ended in 1994 finally.