'In a fly-by-night operation in Africa, Sir David Bruce found that sleeping sickness was spread by this'
Tsetse fly
YES SIR, THAT'S MY SCIENTIST: In a fly-by-night operation in Africa, Sir David Bruce found that sleeping sickness was spread by this
In a fly-by-night operation in Africa, Sir David Bruce found that sleeping sickness was spread by this
In a fly-by-night operation in Africa, Sir David Bruce found that sleeping sickness was spread by this
YES SIR, THAT'S MY SCIENTIST
Tsetse fly
YES SIR, THAT'S MY SCIENTIST