As of today, 600 Million Africans still don’t have access to electricity. Multi-platinum recording artist Akon is doing something to change that by bringing solar power to millions of households in over 20 countries on the African continent with his new Akon Lighting Africa initiative.
See the invisible and take a look at what sound waves look like thanks to a cool high-speed photographic technique called Schlieren Flow visualization which shows the change in air density as sound waves travel through the air. The technique was developed by German physicist August Toepler between 1859 and 1864.
Although the moon has remained largely unchanged during human history, our understanding of it and how it has evolved over time has evolved dramatically.
NASA has identified a new planet very similar to earth but approximately twice the size outside our solar system that might be able to support life. It’s been named Kepler-22b, after the orbiting telescope aircraft that discovered it, is about two and a half times the size of earth and is 600 light-years away, orbiting a sun-like star.