50 colorful portraits of the most famous scientists with their biographies.

More than 150 scientific discoveries that changed the world.

Accompanying texts that briefly present each discovery.

Meet the 50 greatest scientists, their unique achievements, and their amazing stories from ancient times to the present.

Did you know that:

• Anaximander, working in astronomy, created sundials.
• The Hippocratic Oath is an oath taken by physicians and consists of a single page; it is the charter of medical ethics and professional conduct.
• Hipparchus, in the 2nd century BC, managed to accurately determine that the solar year lasts 365.242 days.
• We owe the first use of the number zero to Ptolemy.
• The first complete and accurate description of the human body was presented in 1543 by Vesalius.
• In 1642, Pascal managed to construct 20 calculating machines, known as Pascal's Machines or Pascalines.
• In 1774, Priestley isolated a new gas. The new discovery became known as oxygen.
• In 1796, Jenner discovered the smallpox vaccine, the first vaccine in the world.