1. Earl Babbie is an American sociologist who holds the position of Campbell Professor Emeritus in Behavioral Sciences at Chapman University. He is best known for his book The Practice of Social Research, currently in its 15th English edition, with numerous non-English editions.
2. Roy Bhaskar was an English philosopher of science best known as the initiator of the philosophical movement of critical realism.
3. Galileo Galilei was an Italian astronomer, physicist and engineer, sometimes described as a polymath, from Pisa. Galileo has been called the "father of observational astronomy", the "father of modern physics", the "father of the scientific method", and the "father of modern science".
4. Claudius Ptolemy was a mathematician, astronomer, natural philosopher, geographer and astrologer who wrote several scientific treatises, three of which were of importance to later Byzantine, Islamic and Western European science.
