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Narration voice

The narration is made with Pocket TTS by Kyutai, licensed under Creative Commons Attribution 4.0 (CC BY 4.0), using the in-browser version by KevinAHM (Apache License 2.0).

Its voices come from recordings by Alba MacKenna (CC BY 4.0), the VCTK corpus of the Centre for Speech Technology Research, University of Edinburgh (CC BY 4.0), and Kyutai's Unmute voice donation project (CC0).

Illustrations

Some anatomy drawings (such as the heart cut open) are adapted from Servier Medical Art by Servier (smart.servier.com), licensed under Creative Commons Attribution 4.0 (CC BY 4.0). We converted them to our whiteboard format, recoloured nothing, and added our own labels and animation.

Plant, animal, microbe and virus drawings come from Bioicons (bioicons.com), converted to our whiteboard format. Licensed under Creative Commons Attribution 4.0 (CC BY 4.0): Alejandro Matía, Alexis Maizel, Andi Wilson, Ciera Martinez, Connor Tansley, DBCLS (TogoTV), Daniel Carvalho, Durvesh Burhade & Niliksha Patel, Erin Sparks, Frédéric Bouché, Guillaume Lobet, Lucien Hinderling and Roman Schwob, Matthew Dzievit and Plant Illustrations. Under CC BY 3.0: Servier. Public domain (CC0): Ben Murrell, Ewa Oz, Geomicrobio, Gina Vong, James Lloyd, Mariana Ruiz Villareal, Pauline Franz, Samuel Nestor Meckoni and Simon Dürr. The full list, drawing by drawing, is kept with our source code.

Animal and plant silhouettes come from PhyloPic (phylopic.org). Licensed under Creative Commons Attribution 4.0 (CC BY 4.0): Caleb M. Gordon, Edwin Price, Ivan Iofrida, Luca Leicht, Margot Michaud, Melissa Broussard, Natalie Kestel, painting Guo and the Tree of Life App. Under CC BY 3.0: Deepak Veerappan, Kai Caspar and Manabu Sakamoto. The others are public domain (CC0 or public domain mark), with thanks to their makers.

Molecule structures are drawn by us with RDKit, open-source chemistry software (BSD licence).

Cell, organelle, tissue, receptor, transporter and protein drawings come from the Reactome Icon Library (reactome.org/icon-lib), licensed under Creative Commons Attribution 4.0 (CC BY 4.0) by Reactome (OICR, EMBL-EBI, CSHL, NYU Langone), converted to our whiteboard format. The designer of each drawing is listed with our source code.

Cell, microbe, immune, protein, laboratory and animal drawings come from NIH BioArt Source (bioart.niaid.nih.gov), National Institute of Allergy and Infectious Diseases, in the public domain, converted to our whiteboard format.

Colour drawings of animals, plants, fruit, everyday objects and the physics objects (batteries, magnets, lenses, instruments, vehicles, planets) come from Fluent Emoji by Microsoft (github.com/microsoft/fluentui-emoji), used under the MIT License: Copyright (c) Microsoft Corporation. The full licence text is at /licenses/fluent-emoji-MIT.txt.