1) The concept of 3D printing, also known as additive manufacturing, was first introduced in the 1980s and has since revolutionized prototyping and small-scale production.

2) In Hindu mythology, the Trimurti consists of the three major gods: Brahma (the creator), Vishnu (the preserver), and Shiva (the destroyer). They represent the cycles of creation, preservation, and destruction, respectively, and together embody the cosmic forces that shape the universe.

3) Tom Hanks is an American actor and filmmaker known for his versatile performances in films such as "Forrest Gump," "Saving Private Ryan," and "Cast Away." He has received numerous awards, including Academy Awards, Golden Globes, and BAFTAs.

4) The Great Barrier Reef in Australia is the largest coral reef system in the world and is visible from space.