Explore the structure of DNA double helix and how it was discovered. Learn about the work of Chargaff, Watson and Crick, Wilkins, and Franklin.

The story behind Jocelyn Bell's role in the discovery of pulsars is told in this colorful, comic-book-style resource from A Science Odyssey Web site.

Learn about the experiments by Frederick Griffith, Oswald Avery, Alfred Hershey, and Martha Chase that led to the discovery of DNA as the genetic material.

Learn how genetic code links groups of nucleotides in an mRNA to amino acids in a protein. Also learn about start codons, stop codons, and reading frame.

Learn about Thomas Hunt Morgan's experiments with the fruit fly (Drosophila melanogaster) as a model system.

In this section, students will learn about the major discoveries and developments in western gold, silver, and copper mining in the mid-nineteenth century. They will be able to explain why the cattle industry was paramount to the...

Learn about Darwin's influences that led to his discoveries of change in species over time.