He wanted South Africa to learn that change is good and that everyone should respect each other.
It's 2017 now so it was 2517 years ago to 500bc and 1517 to 500AdD
This is more of a science question, but ok. You see blue light because in the color spectrum blue passes most easily through things. Hence why the sky is blue. Its the light from the sun filtered out and only blue passing all the way through the atmosphere.
Can you be more specific pls