1) The concept of civil rights pertains to the rights and freedoms that individuals possess as members of a society, including equality before the law, freedom of expression, and protection against discrimination.

2) The first commercially successful video game was "Pong," released in 1972 by Atari.

3) Bats are the only mammals capable of sustained flight.

4) The Eiffel Tower can be 15 cm taller during the summer due to thermal expansion.