1) DNA, the building block of life, can store incredible amounts of data. It is estimated that one gram of DNA could potentially store about 215 petabytes of data.

2) The Renaissance period, which began in Italy in the 14th century, marked a renewed interest in art, literature, science, and philosophy.

3) Robert Downey Jr. is an American actor known for his portrayal of Iron Man in the Marvel Cinematic Universe. He has also starred in films such as "Sherlock Holmes," "Chaplin," and "Tropic Thunder," and has received critical acclaim and commercial success for his performances.

4) The concept of virtual reality (VR) involves creating a simulated environment that can be explored and interacted with using specialized headsets and input devices.