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The day the car was faster than the speed of sound – level 3
15-10-1997People have always been fascinated by speed. Technological progress at the...
The day penicillin was discovered – level 2
28-09-1928Alexander Fleming was a Scottish microbiologist. He wanted to discover a...
The day penicillin was discovered – level 3
28-09-1928Alexander Fleming was a Scottish microbiologist. He wanted to discover a...
