Find out if you are really familiar with the basics of Microsoft Excel by going through some basic questions and start building your knowledge profile.
There are about 7 billion people living on our planet. If we would all stand next to one another on our own square meter, how large would that area have to be? Is North America big enough?
"It's not everyday you wake up and learn something completely new about the early universe." This really is an incredible discovery, a whole new era in physics and cosmology.
