Historical Perspectives

Einstein's best-known work not only demonstrates that time itself is relative, but also shows how matter moves. An animated video illustrates the problem of motion, the concept of perspective, and the breakthrough idea that time is...

Just when you thought you had this figured out! Engage young physicists in an interesting look at the nature of a universal constant with a video, part of a PBS playlist on space time and measurement....

Everyone knows that one twin is always older in a pair. But, could a twin be years older? A video from an extensive physics playlist explains Einstein's theory of special relativity. Topics include the speed of light, special versus...

A short video offers a simple, yet engaging, explanation of the theory of evolution using amoebas as an example. The narrator uses the example of the evolution of dog breeds as an example of how humans can influence the course of change.

After learning to calculate probabilities for single examples of genetic crosses in a previous lecture, students are exposed to the concept that allele and genotype frequencies in a population remain in constant equilibrium. A reasonable...

Don't keep your physics class in the dark about night—introduce them to the concept with a short animated video! The narrator discusses how the Big Bang set our universe into an ever-expanding motion where the stars we observe now appear...

If you carefully observe populations with short life cycles, you can observe natural selection happening. The video explains what natural selection is, how scientists theorized it, and how science proves the concept. It highlights the...

No umbrella? No jacket? No problem! Physics scholars learn the mathematical advantage to running in the rain. The narrator illustrates the factors of top rain and side rain and how position and speed influence these factors.

We have all heard about the Big Bang and other theories about how the universe began, but how will it end? Cosmologists study dark matter and dark energy to try to figure out the answer to this mind-blowing question. This topic is a...

How can a bodily function be contagious? It is a question scientists and psychologists are still grappling with, but some of the leading hypotheses are presented here in the case of the contagious yawn. Most likely, it is something we...