Flexi Says: Bose-Einstein condensate is the fifth state of matter predicted by Satyendra Nath Bose and Alber Einstein in the 1920s. At that time, they did not have the proper equipment to confirm the fifth state of matter. It was in 1995 when two scientists Cornell and Weimann confirmed its existence by using the element rubidium. Bose-Einstein condensate occurs at a very low temperature of absolute zero (-273ºC). When the temperature is kept as low as absolute zero, bose-einstein condensate can be created by using few elements such as rubidium, sodium, and lithium.