Observations of light coming from a star zipping in orbit around the humongous black hole at the center of our galaxy have provided fresh evidence backing Albert Einstein's 1915 theory of general relativity, astronomers said on Thursday (July 25).
More than 90 percent of Earth's continental crust is made up of silica-rich minerals, such as feldspar and quartz. But where did this silica-enriched material come from? And could it provide a clue in the search for life on other planets?
A team of US scientists has challenged the popular scientific model that the Universe — space, time, matter and energy — ballooned out from a very hot and dense point and inflated with a Big Bang into how we see the Universe today.