Clips from a four-part episode of the public television series NOVA called "The Fabric of the cosmos" can be accessed on PBS's website (http://pbs.org/wgbh/nova/physics/fabric-ofcosmos.html and complete episodes can be viewed on the Top Documentary Films website (http://topdocumentaryfilms.com/the-fabric-of-the-cosmos). Watch the clips or at least one of the episodes. Are the arguments made in these programs compelling? Is the science explained in a way that makes sense to a general audience?

Scientific documentaries like NOVA's 'The Fabric of the Cosmos' aim to communicate complex scientific concepts to a broad audience. Effective science communication involves breaking down difficult topics so that they are understandable without prior expertise. In these documentaries, methods like analogies, visuals, and real-world examples are often used.

For instance, when discussing the textile-like structure of the universe, visual graphics can illustrate how space-time might appear. Similarly, analogies comparing gravitational waves to ripples in a pond help simplify intricate theories about the universe.

Good science communication ensures that the audience not only understands but also feels connected to the material, often sparking further interest in the subject.

The goal of popular scientific documentaries is to enhance the public's understanding and appreciation of science. Understanding ensures that the general audience can grasp fundamental concepts without requiring background knowledge in the field.

In 'The Fabric of the Cosmos,' the producers must assume various levels of prior knowledge among viewers. Effective strategies include:

• Breaking down intricate ideas into digestible segments.
• Using layman's terms to describe scientific phenomena.
• Illustrating points with relatable examples and visual aids.

The effectiveness of these documentaries can be evaluated by how well they manage to simplify the science without diluting its accuracy. If the audience walks away with a better understanding of space-time, quantum theory, or cosmology, the program has succeeded in its mission.

Critical thinking is essential when evaluating scientific content in documentaries. Viewers must be able to assess the arguments presented, question the supporting evidence, and determine the reliability of the sources.

For example, in 'The Fabric of the Cosmos,' viewers need to consider:

• Whether the arguments are logical and coherent.
• If the scientists' credentials lend credibility to their statements.
• The quality and relevance of the evidence presented.

Critical thinking also involves reflecting on how well the documentary explains the science. Are the explanations clear, or do they require previous knowledge? Does the documentary effectively use visuals and analogies to make the concepts comprehensible? By scrutinizing these aspects, viewers can form well-rounded opinions about the content and its scientific validity.