This documentary traces silk from its first appearance on screen, beginning with a close examination of its unusual strength. As specific sequences unfold, scientists explain how silk’s molecular ...

A student in an Advanced Placement biology class might dissect a fetal pig to study internal organs and the skeleton. But can a student get the same level of experience from a virtual dissection ...

Nearly 400 years ago Galileo performed the first recorded laboratory experiment, timing balls as they rolled down an inclined plane to test his theory of acceleration. Since that time, laboratory ...