Questions answered in this episode:

"If the supermassive black hole in the center of our galaxy were to suddenly become a powerful quasar, what would it mean to life here on earth?" - Barrows0re

"If nothing comes out of black holes, how come Gamma rays shoot from the poles?" - Mokhtar MOHAMMADIAN

"How does Hawking radiation make black holes smaller to the point of disappearing?" - Jon Therkildsen

Submit your questions for the next round of Ask the Experts by clicking here and posting in the YouTube comments (Google account required). And while you're there be sure to subscribe to our Spacelab channel for weekly videos on space and astronomy. 

The question with the most "likes" will be answered in the next video by a new guest expert. Previous episodes have featured astronomer Caleb Scharf, astrophysicist Neil deGrasse Tyson and Scientific American's own editor in chief, Mariette DiChristina.