1) The concept of human rights advocates for the basic rights and freedoms to which all individuals are entitled, regardless of their nationality, ethnicity, religion, or other characteristics.

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

3) The word "guitar" contains three vowels: U, A, and I.

4) The development of the microprocessor by Intel in 1971 paved the way for the modern computer and led to the exponential growth of computing power.