Physics is full of big, interesting questions about phenomenon such as black holes. This illustration shows the supermassive black hole at the heart of the active galaxy NGC 3783 in the southern constellation of Centaurus. M. Kornmesser/ESO hide caption

itoggle caption M. Kornmesser/ESO

If Gravity carries a clear message, it is that the universe is hostile to life. Courtesy of Warner Bros. Pictures hide caption

itoggle caption Courtesy of Warner Bros. Pictures

An artist's impression shows the area around a supermassive black hole at the heart of the galaxy NGC 3783 in the southern constellation of Centaurus. Could a wormhole connect one black hole to another elsewhere in the Universe, creating an entangled pair? M. Kornmesser/ESO hide caption

itoggle caption M. Kornmesser/ESO