Once it was necessary that the people should multiply and be fruitful if the race was to survive. But now to preserve the race it is necessary that people hold back the power of propagation. — Helen Keller Copy Share Image
It is a very naive view to think that the resources and conditions on earth would last forever. Our race has to take necessary steps to be able to develop the technology necessary to live on other planets and moons… — Anousheh Ansari Copy Share Image
