This video uses virtual reality technology to allow viewers to experience the power of a volcano close-up.

Have you ever wondered why the colors of the German flag are black, red, and gold? In explaining how this came to be, this video offers a brief summary of how Germany became one united country.

Was Sisi of Austria truly the romantic fairytale princess that everyone believed her to be? Join us as we delve behind the scenes with Katrin Unterreiner, co-founder of the Sisi Museum in Vienna's Hofburg Palace.

Could eating less help us look younger, and more importantly, could it help us live longer? A few studies seem to show that this could be the case, but there are no conclusive results yet.

Although it might help with fighting age-related diseases in the future, research into calorie restriction and aging is not so far along – or free of contradictions – that we should factor it into our dietary choices.

In this video, physicist and author Harald Lesch talks about how Germany could phase out coal and nuclear power completely and still meet all of its energy needs.

Germany is not a big enough country to devote all of its land to creating renewable energy – but there is another place with vast expanses of empty space and limitless sunshine.