What to know about the 2016 Rio Olympics

Rio de Janeiro (CNN) — As the Olympic Games get underway in earnest, it’s a good time to remember some of the most notable stories from the last three years.

Here’s what we know about athletes, coaches and athletes at the Rio Olympics, including who made the cut and who didn’t.

Here are some things you should know about Brazil, which has been crowned the world’s most populous nation.

Here is a look at the 2016 Olympics.