Two scientists Satyendra Bose and Albert Einstein discovered another state of matter in 1920 but they did not have the equipment and facilities to make it happens at that time. Afterwards it discovered in 1995, Bose-Einstein condensates were made with the help of the advancements in technology.

Explanation:

• Carl Weiman and Eric Cornell cooled a sample of rubidium with the help of magnets and lasers to within a few degrees of absolute zero.
• At the said temperature, the motion of the molecules becomes negligible. As this brings down the kinetic energy, the atoms no longer stay separate, but they begin to clump together. As the atoms join together they form a super-atom.
• Light slows down as it passes through a BEC helping scientists to study more about the nature of light as a wave and particle.
• BEC’s also show properties of a superfluid which implies, it flows without friction.