View full lesson: https://ed.ted.com/lessons/the-surprising-and-invisible-signatures-of-sea-creatures-kakani-katija

On land, animals leave footprints that tell us a lot about their size, form and capabilities. Marine organisms do this too, but these footprints are harder to see since water is translucent. Bioengineer Kakani Katija explains how she uses dyes, lasers and more to make them visible, so that she and her intrepid collaborators can understand more about how sea organisms move.

Talk by Kakani Katija, animation by TED-Ed.