Time does not exist as a universal constant, yet it can be defined as a concrete reality. These concepts and more provide the inspiration for an episode of Space Time's larger series of the same name. It discusses causal order, the multiple perspective conundrum, mass, and time.

Concepts

matter, time, the speed of light, photons

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Additional Tags

science

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Instructional Ideas

• Discuss the paradox presented in more detail

Classroom Considerations

• At the 1:00 mark, the video links to two others that contain the background knowledge required to understand this video
• Intended audience is high-level science students and scientists

• This video is hosted on YouTube

Pros

• Offers closed captioning for the hearing impaired
• Presents advanced concepts as succinctly as possible

Cons

• None

Common Core

SL.9-10.2 SL.11-12.2 RST.9-10.4 RST.11-12.4