Solar Power in the Home

Is it worth having solar power in the home? Setting up a fully independent home solar power system.

While your back is turned the world will change

At $10 a Kg space travel will be almost as cheap as air travel. The world will change. A lot by 2030. Totally by 2050

Intelligent Life on other Planets.

Why haven't we seen aliens if life is common in our Galaxy? Are we alone or are there reasons why they have not visited us?