Once again, you ask and you answer, in the latest installment of our FYI Live feature.
This week, Edward Owens has a poser: "Our universe as far as we know is finite; space is infinite as far as we know. Does anyone think there is another universe, or more out there?"
What do you think? Post your answers below.
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.