Browse Media Learn More

Free Membership - Access to more than just media

Families and school personnel (including those in training) who have at least one student with a disability can sign up for free membership.

Accessible Media

Standards-aligned videos with high-quality captions and audio description.

Teaching Tools

Create lessons and assign videos to managed Student Accounts.

Training Videos

Educator and sign language training videos for school personnel and families.
Learning Center

Find resources for providing equal access in the classroom, making media accessible, and maximizing your use of DCMP's free services.
Visit Learning Center

Accessibility Information

DCMP's Learning Center provides hundreds of articles on topics such as remote learning, transition, blindness, ASL, topic playlists, and topics for parents.

See All

Accessibility Guidelines

DCMP offers the only guidelines developed for captioning and describing educational media, used worldwide.
Captioning Key
Description Key

Help Center

Learn how to apply for membership, find and view accessible media, and use DCMP’s teaching tools.
Help Center
Continuing Education and Professional Development

DCMP offers several online courses, including many that offer RID and ACVREP credit. Courses for students are also available.
See All eLearning Resources

QuickClasses

Asynchronous, online classes for professionals working with students who are deaf, hard of hearing, blind, low vision, or deaf-blind.

See QuickClasses

Workshops

For interpreters, audio describers, parents, and educators working with students who are hard of hearing, low vision, and deaf-blind.
See Workshops

Modules

Modules are self-paced, online trainings designed for professionals, open to eLearners and full members.
See Modules

Students

These self-paced, online learning modules cover the topics of transition, note-taking, and learning about audio description.

See Student Courses
Make your educational content accessible and broadly available.

DCMP can add captions, audio description, and sign language interpretation to your educational videos and E/I programming.
Learn More

Accessibility

Captions are essential for viewers who are deaf and hard of hearing, and audio description makes visual content accessible for the blind and visually impaired.

Distribution

DCMP can ensure that your content is always accessible and always available to children with disabilities through our secure streaming platforms.

Meet our partners

DCMP partners with top creators and distributors of educational content. Take a look
About the Described and Captioned Media Program

The DCMP provides services designed to support and improve the academic achievement of students with disabilities. We partner with top educational and television content creators and distributors to make media accessible and available to these students.
Contact Us
Services

Captioning, audio description, and ASL services

Professional training for school personnel

Distribution of fully accessible streaming media

Projects

Media Center

Television Access

We Describe the World

YouTube Audio Description

Privacy and TOS

Privacy Statement

Terms of Service

Accessibility Policy

Mission and Funding

Read More

Journey to the Microcosmos: How Brownian Motion Helped Prove the Existence of Atoms

10 minutes 7 seconds

Apply for Free Membership

Videos are generally available for preview to non-members as short clips. Limited full-length titles are also available. Log In to view the full length title.

Browse Full-length Non-member Titles

Still image from: Journey to the Microcosmos: How Brownian Motion Helped Prove the Existence of Atoms

Brownian motion is the random motion of particles suspended in a fluid (a liquid or a gas) resulting from their collision with the fast-moving atoms or molecules in the gas or liquid. This transport phenomenon is named after the botanist Robert Brown, and it is proof of the existence of atoms. Part of the "Journey to the Microcosmos" series.

Media Details

Runtime: 10 minutes 7 seconds

Topic: Science
Subtopic: Biology, Microbiology, Science Experiments
Grade/Interest Level: 9 - 12
Release Year: 2022
Producer/Distributor: Complexly
Series: Journey to the Microcosmos
Writer: Polly O'Shea
Report a Problem

Still image from: Journey to the Microcosmos: How Diatoms Build Their Beautiful Shells

Still image from: Journey to the Microcosmos: Leeuwenhoek--The First Master of Microscopes

Still image from: Journey to the Microcosmos: The Fantastic Feet of the Microcosmos

Still image from: Journey to the Microcosmos: The Beautiful, Brutal Tentacles of Hydra

Still image from: Journey to the Microcosmos: These Algae Curl Up Into a Ball When They Get Stressed Out

Still image from: Journey to the Microcosmos: The Tiny Crustacean With the Oldest Penis

Still image from: Journey to the Microcosmos: Dileptus--The Toxic Micro Elephant With an Insatiable Appetite

Still image from: Journey to the Microcosmos: The Arachnid Whose Poop Is Making You Sneeze

Still image from: Journey to the Microcosmos: Tumbling Down Invisible Highways

Still image from: Journey to the Microcosmos: The Purple Bacteria That Are Afraid of Oxygen