Dead stuff: The secret ingredient in our food chain
lesson duration 03:51
666,087 views
lesson duration 03:51
666,087 views
lesson duration 09:41
143,135 views
lesson duration 07:41
26,378 views
Click Register if you need to create a free TED-Ed account. If you have already signed into ted.com click Sign In to verify your authentication.
Only students who are 13 years of age or older can create a TED-Ed account.