that the 18th-century French chemist who is widely considered the father of modern chemistry was beheaded during the French Revolution? the only Nobel laureate in chemistry to also win a Nobel Peace Prize? This section, Matter and Molecules, gives a broad overview of achievement in the chemical and molecular sciences, from the chemical revolution of the 18th century to today. Learn about: The discovery of oxygen The development of the periodic table The uncovering of the DNA double helix You’ll also read about interesting characters such as Antoine Lavoisier, Dmitri Mendeleev, and Linus Pauling, and find answers to the above questions.		Getting Started To start exploring, just click the Time Line, Faces, or Resources buttons above. Within the Time Line, click any of the items along the time line and text will appear describing that historic achievement. Within the Faces section, scroll over any picture on the grid and get a brief description of what the person is known for; click the picture and see a larger image with a brief biography.