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) The Amazon rainforest produces more than 20% of the world's oxygen.

3) The average person spends about 4 years of their life driving a car.

4) A single bolt of lightning can heat the surrounding air to temperatures five times hotter than the surface of the sun.