Let's turn the sun into a telescope. In fact, we don't have to do any work—we just have to be in the right spot.

In the vast universe, galaxies rotate in ways that don’t make sense if only visible matter is considered. For almost a ...

Isaac Newton changed the way we understand the Universe. Revered in his own lifetime, he discovered the laws of gravity and motion and invented calculus. He helped to shape our rational world view.