You can’t block Mark Zuckerberg on Facebook.
Adult cats only meow to communicate with humans.
Concrete is the second most used substance on Earth.
Most married couples are happiest in the third year of their marriage.
In 1906, the Bronx Zoo featured a caged African Man as an exhibit. He later committed suicide.
Twitter is more addictive than cigarettes and alcohol.
Silent reading is a recent phenomenon. Only the most skilled readers of the middle ages could do it.