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Arches National Park Geology Tour provides an extensive, visually rich description of the geology of Arches, by Deborah Ragland, Ph.D. See our DVD collection.
Picture of Louis Pasteur
The Bettmann Archive. From painting by Edelfeld.

Louis Pasteur

Louis Pasteur was a French chemist who lived between 1822-1895. He made great progress in the field of medicine when he came up with a theory about germs, tiny animals that can carry diseases.

Pasteur later saved many lives when he developed vaccines for rabies and other deadly illnesses.


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Science, Evolution, and Creationism

How did life evolve on Earth? The answer to this question can help us understand our past and prepare for our future. Although evolution provides credible and reliable answers, polls show that many people turn away from science, seeking other explanations with which they are more comfortable....more

Scientists Who Studied Life

Carl Sagan Stephen J. Gould Marie Curie Charles Darwin Louis Pasteur Leonardo Da Vinci ...more

Charles Darwin

Charles Darwin was an English Naturalist who lived between 1809-1882. One of the most famous and influential scientists of all time, his ideas changed the ways all other scientists thought. Darwin started...more

Christian Doppler

Christian Doppler was an Austrian mathematician who lived between 1803-1853. He is known for a principle he proposed in 1842. This is now known as the Doppler Effect. He thought that the pitch of a sound...more

Ben Franklin

Ben Franklin was an American scientist and statesman who lived between 1706-1790. He studied electricity and learned of its dangers and possible uses. Franklin developed many inventions that made people's...more

Edmond Halley

Edmond Halley was an English astronomer who lived between 1656-1742. He reasoned that the same comet which he saw in 1682 had appeared before and predicted that it would appear again, about every 76 years....more

William Herschel

William Herschel was born in Germany. He moved to England and worked there most of his life. He lived between 1738-1822. He built powerful telescopes which let him observe the heavens with greater detail....more

Christian Huygens

Christian Huygens was a Dutch physicist and astronomer who lived between 1629-1695. He made improvements in telescopes allowing people to view objects in space with greater detail. Huygens also invented...more

Windows to the Universe, a project of the National Earth Science Teachers Association, is sponsored in part by the National Science Foundation and NASA, our Founding Partners (the American Geophysical Union and American Geosciences Institute) as well as through Institutional, Contributing, and Affiliate Partners, individual memberships and generous donors. Thank you for your support! NASA AGU AGI NSF