You could call them the worst birthday presents ever. At the meeting of minds convened last week to honour Stephen Hawking's 70th birthday - loftily titled "State of the Universe" - two bold proposals posed serious threats to our existing understanding of the cosmos.
One shows that a problematic object called a naked singularity is a lot more likely to exist than previously assumed (see "Naked black-hole hearts live in the fifth dimension"). The other suggests that the universe is not eternal, resurrecting the thorny question of how to kick-start the cosmos without the hand of a supernatural creator.
While many of us may be OK with the idea of the big bang simply starting everything, physicists, including Hawking, tend to shy away from cosmic genesis. "A point of creation would be a place where science broke down. One would have to appeal to religion and the hand of God," Hawking told the meeting, at the University of Cambridge, in a pre-recorded speech.
To read more, click here.