Space exploration will happen but it will need entirely new technologies, ways of thinking and designs. The 20th century fuel and cost intensive machines and technologies must be looked at as the historical foundation of what must be done in this century. The LightSail project is one of these new potentially transforming new ideas. Sailing through space using photon energy from the sun to move through space with no fuel. Check this out. What other Kickstarter effort has Bill Nye and Neil DeGrasse Tyson as pitch men.