When we buy a shiny new electronic product, what do we do with the old one? What is solar power, and where does it really come from?
How does a baby’s brain develop, and when do they begin to see the world the way we do? What makes a planet a planet, and why is Pluto no longer a planet?
There’s a garbage patch in the Pacific, but how bad is it? How old is the Universe, and how do we figure that out?