1) The Cannes Film Festival, held annually in France, is one of the most prestigious film festivals in the world.

2) The phenomenon known as "black holes" occurs when matter is crushed into an infinitely small space, creating a gravitational pull so strong that nothing can escape.

3) The blue whale is the largest animal to have ever existed, with an average length of about 82 feet (25 meters).

4) The FIFA World Cup is the most-watched sporting event globally, with billions of viewers tuning in for the tournament held every four years.